The Meaning of 1 John 4:8 Explained

1 John 4:8

KJV: He that loveth not knoweth not God; for God is love.

YLT: he who is not loving did not know God, because God is love.

Darby: He that loves not has not known God; for God is love.

ASV: He that loveth not knoweth not God; for God is love.

KJV Reverse Interlinear

He that loveth  not  knoweth  not  God;  for  God  is  love. 

What does 1 John 4:8 Mean?

Verse Meaning

Absence of love shows that a person does not have intimate fellowship with God. It does not necessarily show that he was never born of God. Because God is light those who abide in Him walk in His light ( 1 John 1:5; 1 John 1:7). Because God is righteous those who abide in Him practice righteousness ( 1 John 2:29). Just Song of Solomon , God is love and those who abide in Him manifest His loving character. God is also light ( 1 John 1:5), spirit ( John 4:24), and fire ( Hebrews 12:29). These are all metaphors that emphasize certain characteristics of God.
"All His activity is loving activity. If He creates, He creates in love; if He rules, He rules in love; if He Judges , He judges in love. All that He does is the expression of His nature, Isaiah -to love." [1]
""God is love" is rightly recognized as one of the high peaks of divine revelation in this Epistle. Logically the statement stands parallel with "God is light" ( 1 John 1:5) and "God is spirit" ( John 4:24) as one of the three great Johannine expression of the nature of God.... "God is spirit" describes his metaphysical nature, while "God is light" and "God is love" deal with his character, especially as he has revealed himself to men." [2]
"The absence of the article (God is the love) indicates that love is not simply a quality which God possesses, but love is that which he is by his very nature. Further, because God is love, love which he shows is occasioned by himself only and not by any outside cause. The word God is preceded by an article, which means that the statement is not reversible; it cannot read, "Love is God."" [3]
"John does not say that love is God, but only that God is love." [4]

Context Summary

1 John 4:1-11 - The Token Of God's Love
In those days the intense ferment of men's minds wrought many delusions and heresies which were fraught with temptation to young converts, and the Apostle wished to give tests for determining which voice spake from God. The confession of Jesus Christ as the Incarnate Word, a spirit of love and gentleness, and the willingness to abide in the doctrine of the Apostles, were signs that the speaker was commissioned by Christ.
Wouldst thou overcome the world? Let Christ enter, and the world will have no charms for thee. There is only one source of pure, divine love, and wherever that love is present, you know that the possessor has found its source in God. God's love is absolutely selfless. He loves the unloving to make them love, putting away their sin and perfecting their union with Himself. [source]

Chapter Summary: 1 John 4

1  He warns them not to believe all who boast of the Spirit;
7  and exhorts to brotherly love

Greek Commentary for 1 John 4:8

He that loveth not [ο μη αγαπων]
Present active articular participle of αγαπαω — agapaō “keeps on not loving.” [source]
Knoweth not God [ουκ εγνω τον τεον]
Timeless aorist active indicative of γινωσκω — ginōskō has no acquaintance with God, never did get acquainted with him.God is love (ο τεος αγαπη εστιν — ho theos agapē estin). Anarthrous predicate, not η αγαπη — hē agapē John does not say that love is God, but only that God is love. The two terms are not interchangeable. God is also light (1 John 1:5) and spirit (John 4:24). [source]
God is love [ο τεος αγαπη εστιν]
Anarthrous predicate, not η αγαπη — hē agapē John does not say that love is God, but only that God is love. The two terms are not interchangeable. God is also light (1 John 1:5) and spirit (John 4:24). [source]
Knoweth not [οὐκ ἔγνω]
The aroist tense: did not know, from the beginning. He never knew. [source]
Is love [ἀγάπη ἐστίν]
See on God is light (1 John 1:5), and the truth (1 John 1:6); also God is spirit (John 4:24). Spirit and light are expressions of God's essential nature. Love is the expression of His personality corresponding to His nature. See on love of God (1 John 2:5). Truth and love stand related to each other. Loving is the condition of knowing. [source]

Reverse Greek Commentary Search for 1 John 4:8

John 4:24 God is a Spirit [πνεῦμα ὁ Θεός]
Or, as Rev., in margins, God is spirit. Spirit is the emphatic word; Spirit is God. The phrase describes the nature, not the personality of God. Compare the expressions, God is light; God is love (1 John 1:5; 1 John 4:8). [source]
John 17:3 Might know [γινώσκωσι]
Might recognize or perceive. This is striking, that eternal life consists in knowledge, or rather the pursuit of knowledge, since the present tense marks a continuance, a progressive perception of God in Christ. That they might learn to know. Compare John 17:23; John 10:38; 1 John 5:20; 1 John 4:7, 1 John 4:8.“I say, the acknowledgment of God in ChristAccepted by thy reason, solves for thee All questions in the earth and out of it,-DIVIDER-
And has so far advanced thee to be wise. -DIVIDER-
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Wouldst thou improve this to reprove the proved?-DIVIDER-
In life's mere minute, with power to use that proof,-DIVIDER-
Leave knowledge and revert to how it sprung?-DIVIDER-
Thou hast it; use it, and forthwith, or die. -DIVIDER-
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For this I say is death, and the sole death,-DIVIDER-
When a man's loss comes to him from his gain,-DIVIDER-
Darkness from light, from knowledge ignorance,-DIVIDER-
And lack of love from love made manifest.”Robert Browning, “A Death in the Desert.” The relation of perception of God to character is stated in 1 John 3:2, on which see note. [source]

John 1:14 Full of grace and truth [πλήρης χάριτος καὶ ἀληθείας]
This is connected with the main subject of the sentence: “The Word - full of grace and truth.” A common combination in the Old Testament (see Genesis 24:27, Genesis 24:49; Genesis 32:10; Exodus 34:6; Psalm 40:10, Psalm 40:11; Psalm 61:7). In these two words the character of the divine revelation is summed up. “Grace corresponds with the idea of the revelation of God as Love (1 John 4:8, 1 John 4:16) by Him who is Life; and Truth with that of the revelation of God as Light (1 John 1:5) by Him who is Himself Light” (Westcott). Compare John 1:17. On Grace, see on Luke 1:30. [source]
John 1:1 The Word [ὁ λόγος]
Logos. This expression is the keynote and theme of the entire gospel. Λόγος is from the root λεγ , appearing in λέγω , the primitive meaning of which is to lay: then, to pick out, gather, pick up: hence to gather or put words together, and so, to speak. Hence λόγος is, first of all, a collecting or collection both of things in the mind, and of words by which they are expressed. It therefore signifies both the outward form by which the inward thought is expressed, and the inward thought itself, the Latin oratio and ratio: compare the Italian ragionare, “to think” and “to speak.” As signifying the outward form it is never used in the merely grammatical sense, as simply the name of a thing or act ( ἔπος, ὄνομα, ῥῆμα ), but means a word as the thing referred to: the material, not the formal part: a word as embodying a conception or idea. See, for instance, Matthew 22:46; 1 Corinthians 14:9, 1 Corinthians 14:19. Hence it signifies a saying, of God, or of man (Matthew 19:21, Matthew 19:22; Mark 5:35, Mark 5:36): a decree, a precept (Romans 9:28; Mark 7:13). The ten commandments are called in the Septuagint, οἱ δέκα λόγοι , “the ten words ” (Exodus 34:28), and hence the familiar term decalogue. It is further used of discourse: either of the act of speaking (Acts 14:12), of skill and practice in speaking (Acts 18:15; 2 Timothy 4:15), specifically the doctrine of salvation through Christ (Matthew 13:20-23; Philemon 1:14); of narrative, both the relation and the thing related (Acts 1:1; John 21:23; Mark 1:45); of matter under discussion, an affair, a case in law (Acts 15:6; Acts 19:38). -DIVIDER-
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As signifying the inward thought, it denotes the faculty of thinking and reasoning (Hebrews 4:12); regard or consideration (Acts 20:24); reckoning, account (Philemon 4:15, Philemon 4:17; Hebrews 4:13); cause or reason (Acts 10:29). -DIVIDER-
-DIVIDER-
John uses the word in a peculiar sense, here, and in John 1:14; and, in this sense, in these two passages only. The nearest approach to it is in Revelation 19:13, where the conqueror is called the Word of God; and it is recalled in the phrases Word of Life, and the Life was manifested (1 John 1:1, 1 John 1:2). Compare Hebrews 4:12. It was a familiar and current theological term when John wrote, and therefore he uses it without explanation. Old Testament Usage of the TermThe word here points directly to Psalm href="/desk/?q=ps+33:6&sr=1">Psalm 33:6). The idea of God, who is in his own nature hidden, revealing himself in creation, is the root of the Logos-idea, in contrast with all materialistic or pantheistic conceptions of creation. This idea develops itself in the Old Testament on three lines. (1) The Word, as embodying the divine will, is personified in Hebrew poetry. Consequently divine attributes are predicated of it as being the continuous revelation of God in law and prophecy (Psalm 3:4; Isaiah 40:8; Psalm 119:105). The Word is a healer in Psalm 107:20; a messenger in Psalm 147:15; the agent of the divine decrees in Isaiah 55:11. (2) The personified wisdom (Job 28:12sq.; Job 28). Even Death, which unlocks so many secrets, and the underworld, know it only as a rumor (Job href="/desk/?q=job+28:22&sr=1">Job 28:22). It is only God who knows its way and its place (Job 28:23). He made the world, made the winds and the waters, made a decree for the rain and a way for the lightning of the thunder (Job 28:25, Job 28:26). He who possessed wisdom in the beginning of his way, before His works of old, before the earth with its depths and springs and mountains, with whom was wisdom as one brought up with Him (Proverbs 8:26-31), declared it. “It became, as it were, objective, so that He beheld it” (Job 28:27) and embodied it in His creative work. This personification, therefore, is based on the thought that wisdom is not shut up at rest in God, but is active and manifest in the world. “She standeth in the top of high places, by the way in the places of the paths. She crieth at the gates, at the entry of the city, at the coming in at the doors” (Proverbs 8:2, Proverbs 8:3). She builds a palace and prepares a banquet, and issues a general invitation to the simple and to him that wanteth understanding (Proverbs 9:1-6). It is viewed as the one guide to salvation, comprehending all revelations of God, and as an attribute embracing and combining all His other attributes. -DIVIDER-
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(3) The Angel of Jehovah. The messenger of God who serves as His agent in the world of sense, and is sometimes distinguished from Jehovah and sometimes identical with him (Genesis 16:7-13; Genesis 32:24-28; Hosea 12:4, Hosea 12:5; Exodus 23:20, Exodus 23:21; Malachi 3:1). Apocryphal UsageIn the Apocryphal writings this mediative element is more distinctly apprehended, but with a tendency to pantheism. In the Wisdom of Solomon (at least 100 b.c.), where wisdom seems to be viewed as another name for the whole divine nature, while nowhere connected with the Messiah, it is described as a being of light, proceeding essentially from God; a true image of God, co-occupant of the divine throne; a real and independent principle, revealing God in the world and mediating between it and Him, after having created it as his organ - in association with a spirit which is called μονογενές , only begotten (7:22). “She is the breath of the power of God, and a pure influence flowing from the glory of the Almighty; therefore can no defiled thing fall into her. For she is the brightness of the everlasting light, the unspotted mirror of the power of God, and the image of his goodness” (see chapter 7, throughout). Again: “Wisdom reacheth from one end to another mightily, and sweetly doth she order all things. In that she is conversant with God, she magnifieth her nobility: yea, the Lord of all things Himself loved her. For she is privy to the mysteries of the knowledge of God, and a lover of His works. Moreover, by the means of her I shall obtain immortality, and leave behind me an everlasting memorial to them that come after me” (chapter 9). In 16:12, it is said, “Thy word, O Lord, healeth all things” (compare Psalm 107:20); and in 18:15,16, “Thine almighty word leaped from heaven out of thy royal throne, as a fierce man of war into the midst of a land of destruction, and brought thine unfeigned commandment as a sharp sword, and, standing up, filled all things with death; and it touched the heaven, but it stood upon the earth.” See also Wisdom of Sirach, chapters 1,24, and Genesis href="/desk/?q=ge+39:21&sr=1">Genesis 39:21, they paraphrase, “The Memra was with Joseph in prison.” In Psalm 110:1-7Jehovah addresses the first verse to the Memra. The Memra is the angel that destroyed the first-born of Egypt, and it was the Memra that led the Israelites in the cloudy pillar. Usage in the Judaeo-Alexandrine PhilosophyFrom the time of Ptolemy I: (323-285 b.c.), there were Jews in great numbers in Egypt. Philo (a.d. 50) estimates them at a million in his time. Alexandria was their headquarters. They had their own senate and magistrates, and possessed the same privileges as the Greeks. The Septuagint translation of the Hebrew Scriptures into Greek (b.c. 280-150) was the beginning of a literary movement among them, the key-note of which was the reconciliation of Western culture and Judaism, the establishment of a connection between the Old Testament faith and the Greek philosophy. Hence they interpreted the facts of sacred history allegorically, and made them symbols of certain speculative principles, alleging that the Greek philosophers had borrowed their wisdom from Moses. Aristobulus (about 150 b.c.) asserted the existence of a previous and much older translation of the law, and dedicated to Ptolemy VI an allegorical exposition of the Pentateuch, in which he tried to show that the doctrines of the Peripatetic or Aristotelian school were derived from the Old Testament. Most of the schools of Greek philosophy were represented among the Alexandrian Jews, but the favorite one was the Platonic. The effort at reconciliation culminated in Philo, a contemporary of Christ. Philo was intimately acquainted with the Platonic philosophy, and made it the fundamental feature of his own doctrines, while availing himself likewise of ideas belonging to the Peripatetic and Stoic schools. Unable to discern the difference in the points of view from which these different doctrines severally proceeded, he jumbled together not merely discordant doctrines of the Greek schools, but also those of the East, regarding the wisdom of the Greeks as having originated in the legislation and writings of Moses. He gathered together from East and West every element that could help to shape his conception of a vicegerent of God, “a mediator between the eternal and the ephemeral. His Logos reflects light from countless facets.” According to Philo, God is the absolute Being. He calls God “that which is:” “the One and the All.” God alone exists for himself, without multiplicity and without mixture. No name can properly be ascribed to Him: He simply is. Hence, in His nature, He is unknowable. -DIVIDER-
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Outside of God there exists eternal matter, without form and void, and essentially evil; but the perfect Being could not come into direct contact with the senseless and corruptible; so that the world could not have been created by His direct agency. Hence the doctrine of a mediating principle between God and matter - the divine Reason, the Logos in whom are comprised all the ideas of finite things, and who created the sensible world by causing these ideas to penetrate into matter. -DIVIDER-
-DIVIDER-
The absolute God is surrounded by his powers ( δυνάμεις ) as a king by his servants. These powers are, in Platonic language, ideas; in Jewish, angels; but all are essentially one, and their unity, as they exist in God, as they emanate from him, as they are disseminated in the world, is expressed by Logos Hence the Logos appears under a twofold aspect: (1) As the immanent reason of God, containing within itself the world-ideal, which, while not outwardly existing, is like the immanent reason in man. This is styled Λόγος ἐνδιάθετος , i.e., the Logos conceived and residing in the mind. This was the aspect emphasized by the Alexandrians, and which tended to the recognition of a twofold personality in the divine essence. (2) As the outspoken word, proceeding from God and manifest in the world. This, when it has issued from God in creating the world, is the Λόγος προφορικός , i.e., the Logos uttered, even as in man the spoken word is the manifestation of thought. This aspect prevailed in Palestine, where the Word appears like the angel of the Pentateuch, as the medium of the outward communication of God with men, and tends toward the recognition of a divine person subordinate to God. Under the former aspect, the Logos is, really, one with God's hidden being: the latter comprehends all the workings and revelations of God in the world; affords from itself the ideas and energies by which the world was framed and is upheld; and, filling all things with divine light and life, rules them in wisdom, love, and righteousness. It is the beginning of creation, not inaugurated, like God, nor made, like the world; but the eldest son of the eternal Father (the world being the younger); God's image; the mediator between God and the world; the highest angel; the second God. -DIVIDER-
-DIVIDER-
Philo's conception of the Logos, therefore, is: the sum-total and free exercise of the divine energies; so that God, so far as he reveals himself, is called Logos; while the Logos, so far as he reveals God, is called God. -DIVIDER-
-DIVIDER-
John's doctrine and terms are colored by these preceding influences. During his residence at Ephesus he must have become familiar with the forms and terms of the Alexandrian theology. Nor is it improbable that he used the term Logos with an intent to facilitate the passage from the current theories of his time to the pure gospel which he proclaimed. “To those Hellenists and Hellenistic Jews, on the one hand, who were vainly philosophizing on the relations of the finite and infinite; to those investigators of the letter of the Scriptures, on the other, who speculated about the theocratic revelations, John said, by giving this name Logos to Jesus: 'The unknown Mediator between God and the world, the knowledge of whom you are striving after, we have seen, heard, and touched. Your philosophical speculations and your scriptural subtleties will never raise you to Him. Believe as we do in Jesus, and you will possess in Him that divine Revealer who engages your thoughts'” (Godet). -DIVIDER-
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But John's doctrine is not Philo's, and does not depend upon it. The differences between the two are pronounced. Though both use the term Logos, they use it with utterly different meanings. In John it signifies word, as in Holy Scripture generally; in Philo, reason; and that so distinctly that when Philo wishes to give it the meaning of word, he adds to it by way of explanation, the term ῥῆμα , word. The nature of the being described by Logos is conceived by each in an entirely different spirit. John's Logos is a person, with a consciousness of personal distinction; Philo's is impersonal. His notion is indeterminate and fluctuating, shaped by the influence which happens to be operating at the time. Under the influence of Jewish documents he styles the Logos an “archangel;” under the influence of Plato, “the Idea of Ideas;” of the Stoics, “the impersonal Reason.” It is doubtful whether Philo ever meant to represent the Logos formally as a person. All the titles he gives it may be explained by supposing it to mean the ideal world on which the actual is modeled. -DIVIDER-
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In Philo, moreover, the function of the Logos is confined to the creation and preservation of the universe. He does not identify or connect him with the Messiah. His doctrine was, to a great degree, a philosophical substitute for Messianic hopes. He may have conceived of the Word as acting through the Messiah, but not as one with him. He is a universal principle. In John the Messiah is the Logos himself, uniting himself with humanity, and clothing himself with a body in order to save the world. -DIVIDER-
-DIVIDER-
The two notions differ as to origin. The impersonal God of Philo cannot pass to the finite creation without contamination of his divine essence. Hence an inferior agent must be interposed. John's God, on the other hand, is personal, and a loving personality. He is a Father (John 1:18); His essence is love (John 3:16; 1 John 4:8, 1 John 4:16). He is in direct relation with the world which He desires to save, and the Logos is He Himself, manifest in the flesh. According to Philo, the Logos is not coexistent with the eternal God. Eternal matter is before him in time. According to John, the Logos is essentially with the Father from all eternity (John 1:2), and it is He who creates all things, matter included (John 1:3). -DIVIDER-
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Philo misses the moral energy of the Hebrew religion as expressed in its emphasis upon the holiness of Jehovah, and therefore fails to perceive the necessity of a divine teacher and Savior. He forgets the wide distinction between God and the world, and declares that, were the universe to end, God would die of loneliness and inactivity. The Meaning of Logos in JohnAs Logos has the double meaning of thought and speech, so Christ is related to God as the word to the idea, the word being not merely a name for the idea, but the idea itself expressed. The thought is the inward word (Dr. Schaff compares the Hebrew expression “I speak in my heart” for “I think”). The Logos of John is the real, personal God (John 1:1), the Word, who was originally before the creation with God. and was God, one in essence and nature, yet personally distinct (John 1:1, John 1:18); the revealer and interpreter of the hidden being of God; the reflection and visible image of God, and the organ of all His manifestations to the world. Compare Hebrews 1:3. He made all things, proceeding personally from God for the accomplishment of the act of creation (Hebrews 1:3), and became man in the person of Jesus Christ, accomplishing the redemption of the world. Compare Philemon 2:6. -DIVIDER-
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The following is from William Austin, “Meditation for Christmas Day,” cited by Ford on John:-DIVIDER-
“The name Word is most excellently given to our Savior; for it expresses His nature in one, more than in any others. Therefore St. John, when he names the Person in the Trinity (1 John 5:7), chooses rather to call Him Word than Son; for word is a phrase more communicable than son. Son hath only reference to the Father that begot Him; but word may refer to him that conceives it; to him that speaks it; to that which is spoken by it; to the voice that it is clad in; and to the effects it raises in him that hears it. So Christ, as He is the Word, not only refers to His Father that begot Him, and from whom He comes forth, but to all the creatures that were made by Him; to the flesh that He took to clothe Him; and to the doctrine He brought and taught, and, which lives yet in the hearts of all them that obediently do hear it. He it is that is this Word; and any other, prophet or preacher, he is but a voice (Luke 3:4). Word is an inward conception of the mind; and voice is but a sign of intention. St. John was but a sign, a voice; not worthy to untie the shoe-latchet of this Word. Christ is the inner conception 'in the bosom of His Father;' and that is properly the Word. And yet the Word is the intention uttered forth, as well as conceived within; for Christ was no less the Word in the womb of the Virgin, or in the cradle of the manger, or on the altar of the cross, than he was in the beginning, 'in the bosom of his Father.' For as the intention departs not from the mind when the word is uttered, so Christ, proceeding from the Father by eternal generation, and after here by birth and incarnation, remains still in Him and with Him in essence; as the intention, which is conceived and born in the mind, remains still with it and in it, though the word be spoken. He is therefore rightly called the Word, both by His coming from, and yet remaining still in, the Father.”And the WordA repetition of the great subject, with solemn emphasis.Was with God ( ἦν πὸς τὸν Θεὸν )Anglo-Saxon vers., mid Gode. Wyc., at God. With ( πρός ) does not convey the full meaning, that there is no single English word which will give it better. The preposition πρός , which, with the accusative case, denotes motion towards, or direction, is also often used in the New Testament in the sense of with; and that not merely as being near or beside, but as a living union and communion; implying the active notion of intercourse. Thus: “Are not his sisters here with us ” ( πρὸς ἡμᾶς ), i.e., in social relations with us (Mark 6:3; Matthew 13:56). “How long shall I be with you ” ( πρὸς ὑμᾶς , Mark 9:16). “I sat daily with you ” (Matthew 26:55). “To be present with the Lord ” ( πρὸς τὸν Κύριον , 2 Corinthians 5:8). “Abide and winter with you ” (1 Corinthians 16:6). “The eternal life which was with the Father ” ( πρὸς τὸν πατέρα , 1 John 1:2). Thus John's statement is that the divine Word not only abode with the Father from all eternity, but was in the living, active relation of communion with Him.And the Word was God ( καὶ Θεὸς ἦν ὁ λόγος )In the Greek order, and God was the Word, which is followed by Anglo-Saxon, Wyc., and Tynd. But θεὸς , God, is the predicate and not the subject of the proposition. The subject must be the Word; for John is not trying to show who is God, but who is the Word. Notice that Θεὸς is without the article, which could not have been omitted if he had meant to designate the word as God; because, in that event, Θεὸς would have been ambiguous; perhaps a God. Moreover, if he had said God was the Word, he would have contradicted his previous statement by which he had distinguished (hypostatically) God from the word, and λόγος (Logos) would, further, have signified only an attribute of God. The predicate is emphatically placed in the proposition before the subject, because of the progress of the thought; this being the third and highest statement respecting the Word - the climax of the two preceding propositions. The word God, used attributively, maintains the personal distinction between God and the Word, but makes the unity of essence and nature to follow the distinction of person, and ascribes to the Word all the attributes of the divine essence. “There is something majestic in the way in which the description of the Logos, in the three brief but great propositions of John 1:1, is unfolded with increasing fullness” (Meyer). [source]

John 4:24 God is a Spirit [πνευμα ο τεος]
More precisely, “God is Spirit” as “God is Light” (1 John 1:5), “God is Love” (1 John 4:8). In neither case can we read Spirit is God, Light is God, Love is God. The non-corporeality of God is clearly stated and the personality of God also. All this is put in three words for the first time. Must Here is the real necessity (δει — dei), not the one used by the woman about the right place of worship (John 4:20). [source]
1 Corinthians 8:3 The same is known of Him [οὗτος ἔγνωσται ὑπ ' αὐτοῦ]
The same, i.e., this same man who loves God. He does not say knows God, but implies this in the larger truth, is known by God. Compare Galatians 4:9; 1 John 4:7, 1 John 4:8, 1 John 4:16; 2 Timothy 2:19. Γινώσκω in New-Testament Greek often denotes a personal relation between the knower and the known, so that the knowledge of an object implies the influence of that object upon the knower. So John 2:24, John 2:25; 1 Corinthians 2:8; 1 John 4:8. In John the relation itself is expressed by the verb. John 17:3, John 17:25; 1 John 5:20; 1 John 4:6; 1 John 2:3, 1 John 2:4, 1 John 2:5. [source]
2 Thessalonians 1:8 On them that know not God - obey not the gospel [τοῖς μὴ εἰδόσι θεὸν - τοῖς μὴ ὑπακούουσιν τῷ εὐγγελίῳ]
To know God is to know him as the one, true God as distinguished from false gods; to know his will, his holiness, his hatred of sin, and his saving intent toward mankind. Two words are used of such knowledge, εἰδέναι and γινώσκειν . Both are applied to the heathen and to Christians, and both are used of the Jews' knowledge of God. Ἑιδέναι , of heathen, Galatians 4:8; 1 Thessalonians 4:5; 2 Thessalonians 1:8. Γινώσκειν of heathen, Romans 1:21; 1 Corinthians 1:21. Ἑιδέναι , of Christ and Christians, John 7:29, John 8:19, John 8:55; John 14:7. Γινώσκειν of Christ and Christians, Galatians 4:9; 1 John 2:13, 1 John 2:14; 1 John 4:6, 1 John 4:7, 1 John 4:8; John 10:15; John 17:3. In John, γινώσκειν of Jews who do not know the Father, John 16:3; John 8:55: εἰδέναι , John 7:28; John 8:19; John 15:21. The two are combined, John 1:26; John 7:27; John 8:55; 2 Corinthians 5:16. A distinction is asserted between γινώσκειν as knowledge grounded in personal experience, apprehension of external impressions - and εἰδέμαι purely mental perception in contrast with conjecture or knowledge derived from others. There are doubtless passages which bear out this distinction (see on John 2:24), but it is impossible to carry it rigidly through the N.T. In the two classes, - those who know not God and those who obey not the gospel, - it is not probable that Paul has in mind a distinction between Jews and Gentiles. The Jews were not ignorant of God, yet they are described by John as not knowing him. The Gentiles are described by Paul as knowing God, but as refusing to glorify him as God (Romans 1:21). Paul rather describes here the subjects of God's judgment as one class, but under different aspects. [source]
1 John 4:16 God is love [ο τεος αγαπη εστιν]
Repeated from 1 John 4:8. So he gathers up the whole argument that one who is abiding in love is abiding in God and shows that God is abiding in him. Thoroughly Johannine style. [source]
1 John 1:5 God is Light [Θεὸς φῶς ἐστὶν]
A statement of the absolute nature of God. Not a light, nor the light, with reference to created beings, as the light of men, the light of the world, but simply and absolutely God is light, in His very nature. Compare God is spirit, and see on John 4:24: God is love, 1 John 4:8, 1 John 4:16. The expression is not a metaphor. “All that we are accustomed to term light in the domain of the creature, whether with a physical or metaphysical meaning, is only an effluence of that one and only primitive Light which appears in the nature of God” (Ebrard). Light is immaterial, diffusive, pure, and glorious. It is the condition of life. Physically, it represents glory; intellectually, truth; morally, holiness. As immaterial it corresponds to God as spirit; as diffusive, to God as love; as the condition of life, to God as life; as pure and illuminating, to God as holiness and truth. In the Old Testament, light is often the medium of God's visible revelations to men. It was the first manifestation of God in creation. The burning lamp passed between the pieces of the parted victim in God's covenant with Abraham. God went before Israel in a pillar of fire, descended in fire upon Sinai, and appeared in the luminons cloud which rested on the mercy-seat in the most holy place. In classical Greek φῶς lightis used metaphorically for delight, deliverance, victory, and is applied to persons as a term of admiring affection, as we say that one is the light of our life, or the delight of our eyes. So Ulysses, on seeing his son Telemachus, says, “Thou hast come, Telemachus, sweet light ( γλυκερὸν φάος )” (Homer, “Odyssey,” xvi., 23). And Electra, greeting her returning brother, Orestes, “O dearest light ( φίλτατον φῶς )” (Sophocles, “Electra,” 1223). Occasionally, as by Euripides, of the light of truth (“Iphigenia at Tauris,” 1046). No modern writer has developed the idea of God as light with such power and beauty as Dante. His “Paradise” might truthfully be called a study of light. Light is the only visible expression of God. Radiating from Him, it is diffused through the universe as the principle of life. This key-note is struck at the very opening of “the Paradise.”“The glory of Him who moveth everythingDoth penetrate the universe, and shine In one part more and in another less. -DIVIDER-
-DIVIDER-
Within that heaven which most His light receives-DIVIDER-
Was I.”“Paradiso,” i., 1-5. In the final, beatific vision, God Himself is imagined as a luminous point which pours its rays through all the spheres, upon which the spirits gazed, and in which they read the past, the present, and the future.“O grace abundant, by which I presumedTo fix my sight upon the Light Eternal, So that the seeing I consumed therein!-DIVIDER-
I saw that in its depth far down is lying-DIVIDER-
Bound up with love together in one volume,-DIVIDER-
What through the universe in leaves is scattered;-DIVIDER-
Substance, and accident, and their operations,-DIVIDER-
All interfused together in such wise-DIVIDER-
That what I speak of is one simple light.”“Paradiso,” xxxiii., 82-90.“In presence of that light one such becomes, That to withdraw therefrom for other prospect-DIVIDER-
It is impossible he e'er consent;-DIVIDER-
Because the good, which object of will,-DIVIDER-
Is gathered all in this, and out of it-DIVIDER-
That is defective which is perfect there.”“Paradiso,” xxxiii., 100-105.“O Light eterne, sole in thyself that dwellest, Sole knowest thyself, and, know unto thyself-DIVIDER-
And knowing, lovest and smilest on thyself!“Paradiso xxxiii., 124-126. Light enkindles love.“If in the heat of love I flame upon theeBeyond the measure that on earth is seen, So that the valor of thine eyes I vanquish,-DIVIDER-
Marvel thou not thereat; for this proceeds-DIVIDER-
From perfect sight, which, as it apprehends,-DIVIDER-
To the good apprehended moves its feet. -DIVIDER-
-DIVIDER-
Well I perceive how is already shining-DIVIDER-
Into thine intellect the eternal Light,-DIVIDER-
That only seen enkindles always love.”“Paradiso,” v., 1-9 See also “ Paradiso,” cantos xxx., xxxi. [source]

What do the individual words in 1 John 4:8 mean?

The [one] not loving not has known - God because - God love is
μὴ ἀγαπῶν οὐκ ἔγνω τὸν Θεόν ὅτι Θεὸς ἀγάπη ἐστίν

  The  [one] 
Parse: Article, Nominative Masculine Singular
Root:  
Sense: this, that, these, etc.
ἀγαπῶν  loving 
Parse: Verb, Present Participle Active, Nominative Masculine Singular
Root: ἀγαπάω  
Sense: of persons.
ἔγνω  has  known 
Parse: Verb, Aorist Indicative Active, 3rd Person Singular
Root: γινώσκω  
Sense: to learn to know, come to know, get a knowledge of perceive, feel.
τὸν  - 
Parse: Article, Accusative Masculine Singular
Root:  
Sense: this, that, these, etc.
Θεόν  God 
Parse: Noun, Accusative Masculine Singular
Root: θεός  
Sense: a god or goddess, a general name of deities or divinities.
ὅτι  because 
Parse: Conjunction
Root: ὅτι  
Sense: that, because, since.
  - 
Parse: Article, Nominative Masculine Singular
Root:  
Sense: this, that, these, etc.
Θεὸς  God 
Parse: Noun, Nominative Masculine Singular
Root: θεός  
Sense: a god or goddess, a general name of deities or divinities.
ἀγάπη  love 
Parse: Noun, Nominative Feminine Singular
Root: ἀγάπη  
Sense: brotherly love, affection, good will, love, benevolence.