The Meaning of Revelation 3:21 Explained

Revelation 3:21

KJV: To him that overcometh will I grant to sit with me in my throne, even as I also overcame, and am set down with my Father in his throne.

YLT: He who is overcoming -- I will give to him to sit with me in my throne, as I also did overcome and did sit down with my Father in His throne.

Darby: He that overcomes, to him will I give to sit with me in my throne; as I also have overcome, and have sat down with my Father in his throne.

ASV: He that overcometh, I will give to him to sit down with me in my throne, as I also overcame, and sat down with my Father in his throne.

What does Revelation 3:21 Mean?

Study Notes

Father
This passage, in harmony with Luke 1:32 ; Luke 1:33 ; Matthew 19:28 ; Acts 2:30 ; Acts 2:34 ; Acts 2:35 ; Acts 15:14-16 is conclusive that Christ is not now seated upon His own throne. The Davidic Covenant, and the promises of God through the prophets and Angle Gabriel concerning the Messianic kingdom await fulfilment.

Context Summary

Revelation 3:14-22 - "i Stand At The Door And Knock"
It is better to be cold than lukewarm, for in the latter case all that God's love can do for the soul has only produced a moderate result, while if we are cold, our soul has yet to be tried. The Gospel has a better chance with the openly profane and godless than with those who have been brought up under its influence and are so far unaffected. The mischief with men generally is that they do not know themselves, and do not want to know; and they are equally ignorant of the rich stores of blessedness that Christ waits to bestow. We think that we abound in gift and grace, when in Christ's eyes we are most pitiable. Yet, at this moment, He is standing at the door, laden with the gifts of heaven. Admit Him, or at least lift the latch of the will, so that He may push the door back and enter. Do not attempt to deal with the squalor within; He will see to that, and cleanse, keep, and enrich. Do not try to provide supper; He will bring thee His own flesh and blood.
Ponder that last beatitude, which promises to all believers that if they share with Him His age-long conflict against the evil of the world, they shall share His rule and power, which they shall use with Him for the uplift and blessing of mankind. Complete and continually renewed self-surrender to Christ will admit into our hearts the royalty and power of Christ. [source]

Chapter Summary: Revelation 3

1  The angel of the church of Sardis is reproved and exhorted to repent
7  The angel of the church of Philadelphia is approved for his diligence and patience;
14  the angel of Laodicea rebuked for being neither hot nor cold
20  Christ stands at the door and knocks

Greek Commentary for Revelation 3:21

He that overcometh [ο νικων]
Absolute nominative again as in Revelation 3:12, but resumed this time by the dative αυτωι — autōi as in Revelation 2:26. [source]
To sit [κατισαι]
First aorist active infinitive of κατιζω — kathizō This promise grows out of the prophecy that the saints will share in the Messiah‘s rule, made to the twelve (Matthew 19:28; Luke 22:29.), repeated by Paul (1 Corinthians 6:2.), enlarged in Revelation 22:1-5 (to last forever, 2 Timothy 2:11.). James and John took this hope and promise literally (Mark 10:40) not metaphorically.As I also overcame (ως καγω ενικησα — hōs kagō enikēsa). First aorist active indicative of νικαω — nikaō looking back on the victory as over in the past. In John 16:33 before the Cross Jesus says Εγω νενικηκα τον κοσμον — Egō nenikēka ton kosmon (perfect active), emphasizing the abiding effect of the victory.Sat down “I took my seat” (Hebrews 1:3) where Christ is now (Revelation 22:3; Colossians 3:1). Cf. 1 John 5:4; Revelation 2:27. Each of these seven messages begins alike and ends alike. Each is the message of the Christ and of the Holy Spirit to the angel of the church. Each has a special message suited to the actual condition of each church. In each case the individual who overcomes has a promise of blessing. Christ the Shepherd knows his sheep and lays bare the particular peril in each case. [source]
As I also overcame [ως καγω ενικησα]
First aorist active indicative of νικαω — nikaō looking back on the victory as over in the past. In John 16:33 before the Cross Jesus says Εγω νενικηκα τον κοσμον — Egō nenikēka ton kosmon (perfect active), emphasizing the abiding effect of the victory. [source]
Sat down [εκατισα]
“I took my seat” (Hebrews 1:3) where Christ is now (Revelation 22:3; Colossians 3:1). Cf. 1 John 5:4; Revelation 2:27. Each of these seven messages begins alike and ends alike. Each is the message of the Christ and of the Holy Spirit to the angel of the church. Each has a special message suited to the actual condition of each church. In each case the individual who overcomes has a promise of blessing. Christ the Shepherd knows his sheep and lays bare the particular peril in each case. [source]
He that overcometh []
See on Revelation 2:7. [source]

Reverse Greek Commentary Search for Revelation 3:21

Mark 16:19 Sat down at the right hand of God [εκατισεν εκ δεχιων του τεου]
Swete notes that the author “passes beyond the field of history into that of theology,” an early and most cherished belief (Acts 7:55.; Romans 8:34; Ephesians 1:20; Colossians 3:1; Hebrews 1:3; Hebrews 8:1; Hebrews 10:12; Hebrews 12:2; 1 Peter 3:22; Revelation 3:21). [source]
Ephesians 2:6 Made us sit together [συνεκάθισεν]
Compare set Him, Ephesians 1:20. Together is ambiguous. Render with Him, as Rev. “Even now we sit there in Him, and shall sit with Him in the end” (Andrews, cited by Ellicott). Compare Romans 8:30; Revelation 3:21. Meyer renders hath given us joint seat. [source]
Colossians 3:1 Sitteth [ἐστιν καθήμενος]
According to the A.V. the literal rendering would be is sitting. Is, however, must be taken separately; where Christ is, seated. Seated is a secondary predicate, as hidden in Colossians 2:3. Compare Ephesians 2:4-6; Revelation 3:21. [source]
Hebrews 3:14 We are made partakers of Christ [μέτοχοι γὰρ τοῦ Χριστοῦ γεγόναμεν]
Rend. we are become fellows with Christ. For fellows see Luke 5:7; Hebrews 1:9. It marks even a closer relation than “brethren.” See Luke 22:30; Romans 8:17; Revelation 3:21. [source]
Hebrews 1:3 Sat down on the right hand of the majesty on high [ἐκάθισεν ἐν δεξιᾷ τῆς μεγαλωσύνης ἐν ὑψηλοῖς]
Comp. Psalm 110:1, Hebrews 8:1; Hebrews 10:12; Hebrews 12:2; Ephesians 1:20; Revelation 3:21. The verb denotes a solemn, formal act; the assumption of a position of dignity and authority The reference is to Christ's ascension. In his exalted state he will still be bearing on all things toward their consummation, still dealing with sin as the great high priest in the heavenly sanctuary. This is elaborated later. See Hebrews 8:1-13; Hebrews 9:12ff. Μεγαλωσύνη majestyonly here, Hebrews 8:1; Judges 1:25. Quite often in lxx. There is suggested, not a contrast with his humiliation, but his resumption of his original dignity, described in the former part of this verse. Ἐν ὑψηλοῖς , lit. in the high places. Const. with sat down, not with majesty. The phrase N.T.olxx, Psalm 92:4; Psalm 112:5. Ἐν τοῖς ὑψίστοις inthe highest (places ), in the Gospels, and only in doxologies. See Matthew 21:9; Mark 11:10; Luke 2:14. Ἐν τοῖς ἐπουρανίοις inthe heavenly (places ), only in Ephesians. See Ephesians 1:3, Ephesians 1:20; Ephesians 2:6; Ephesians 3:10; Ephesians 6:12. [source]
Revelation 1:1 To shew [δεῖξαι]
Frequent in Revelation (Revelation 4:1; Revelation 17:1; Revelation 21:9; Revelation 22:1). Construe with ἔδωκεν gavegave him to shew. Compare “I will give him to sit” (Revelation 3:21): “It was given to hurt” (Revelation 7:2): “It was given him to do;” (A.V. “had power to do;” Revelation 13:14). [source]
Revelation 11:3 I will give [δωσω]
Future active of διδωμι — didōmi The speaker may be God (Beckwith) or Christ (Swete) as in Revelation 2:13; Revelation 21:6 or his angel representative (Revelation 22:7, Revelation 22:12.). The idiom that follows is Hebraic instead of either the infinitive after διδωμι — didōmi as in Revelation 2:7; Revelation 3:21; Revelation 6:4; Revelation 7:2; Revelation 13:7, Revelation 13:15; Revelation 16:8 or ινα — hina with the subjunctive (Revelation 9:5; Revelation 19:8) we have και προπητευσουσιν — kai prophēteusousin (and they shall prophesy). [source]
Revelation 12:11 They overcame him [αυτοι ενικησαν]
First aorist active indicative of νικαω — nikaō the verb used by Jesus of his own victory (John 16:33) and about him (Revelation 3:21; Revelation 5:5). “The victory of the martyrs marks the failure of Satan‘s endeavours” (Swete). [source]
Revelation 2:7 The spirit [το πνευμα]
The Holy Spirit as in Revelation 14:13; Revelation 22:17. Both Christ and the Holy Spirit deliver this message. “The Spirit of Christ in the prophet is the interpreter of Christ‘s voice” (Swete).To him that overcometh (τωι νικωντι — tōi nikōnti). Dative of the present (continuous victory) active articular participle of νικαω — nikaō a common Johannine verb (John 16:33; 1 John 2:13; 1 John 4:4; 1 John 5:4.; Revelation 2:7, Revelation 2:11, Revelation 2:17, Revelation 2:26; Revelation 3:5, Revelation 3:12, Revelation 3:21; Revelation 5:5; Revelation 12:11; Revelation 15:2; Revelation 17:14; Revelation 21:7). Faith is dominant in Paul, victory in John, faith is victory (1 John 5:4). So in each promise to these churches.I will give Future active of διδωμι — didōmi as in Revelation 2:10, Revelation 2:17, Revelation 2:23, Revelation 2:26, Revelation 2:28; Revelation 3:8, Revelation 3:21; Revelation 6:4; Revelation 11:3; Revelation 21:6.To eat (παγειν — phagein). Second aorist active infinitive of εστιω — esthiō the tree of life (εκ του χυλου της ζωης — ek tou xulou tēs zōēs). Note εκ — ek with the ablative with παγειν — phagein like our “eat of” (from or part of). From Genesis 2:9; Genesis 3:22. Again in Revelation 22:2, Revelation 22:14 as here for immortality. This tree is now in the Garden of God. For the water of life see Revelation 21:6; Revelation 22:17 (Cf. John 4:10, John 4:13.).Which The χυλον — xulon (tree).In the Paradise of God (εν τωι παραδεισωι του τεου — en tōi paradeisōi tou theou). Persian word, for which see Luke 23:43; 2 Corinthians 12:4. The abode of God and the home of the redeemed with Christ, not a mere intermediate state. It was originally a garden of delight and finally heaven itself (Trench), as here. [source]
Revelation 2:7 To him that overcometh [τωι νικωντι]
Dative of the present (continuous victory) active articular participle of νικαω — nikaō a common Johannine verb (John 16:33; 1 John 2:13; 1 John 4:4; 1 John 5:4.; Revelation 2:7, Revelation 2:11, Revelation 2:17, Revelation 2:26; Revelation 3:5, Revelation 3:12, Revelation 3:21; Revelation 5:5; Revelation 12:11; Revelation 15:2; Revelation 17:14; Revelation 21:7). Faith is dominant in Paul, victory in John, faith is victory (1 John 5:4). So in each promise to these churches. [source]
Revelation 2:26 He that overcometh and he that keepeth [ο νικων και ο τηρων]
Present active articular participles of νικαω — nikaō and τηρεω — tēreō in the nominative absolute (nominativus pendens) as in Revelation 3:12, Revelation 3:21, resumed by the dative αυτωι — autōi (to him), as in Revelation 2:7, Revelation 2:17. [source]
Revelation 22:1 Proceeding out of the throne of God and of the Lamb [εκπορευομενον εκ του τρονου του τεου και του αρνιου]
Cf. Ezekiel 47:1; Zechariah 14:8. Already in Revelation 3:21 Christ is pictured as sharing the Father‘s throne as in Hebrews 1:3. See also Revelation 22:3. This phrase has no bearing on the doctrine of the Procession of the Holy Spirit. [source]
Revelation 1:1 The Revelation [ἀποκάλυψις]
The Greek word is transcribed in Apocalypse. The word occurs only once in the Gospels, Luke 2:32, where to lighten should be rendered for revelation. It is used there of our Lord, as a light to dispel the darkness under which the heathen were veiled. It occurs thirteen times in Paul's writings, and three times in first Peter. It is used in the following senses: (a.) The unveiling of something hidden, which gives light and knowledge to those who behold it. See Luke 2:32(above). Christianity itself is the revelation of a mystery (Romans 16:25). The participation of the Gentiles in the privileges of the new covenant was made known by revelation (Ephesians 3:3). Paul received the Gospel which he preached by revelation (Galatians 1:12), and went up to Jerusalem by revelation (Galatians 2:2). -DIVIDER-
-DIVIDER-
(b.) Christian insight into spiritual truth. Paul asks for Christians the spirit of revelation (Ephesians 1:17). Peculiar manifestations of the general gift of revelation are given in Christian assemblies (1 Corinthians 14:6, 1 Corinthians 14:26). Special revelations are granted to Paul (2 Corinthians 12:1, 2 Corinthians 12:7). -DIVIDER-
-DIVIDER-
(c.) The second coming of the Lord (1 Peter 1:7, 1 Peter 1:13; 2 Thessalonians 1:7; 1 Corinthians 1:7) in which His glory shall be revealed (1 Peter 4:13), His righteous judgment made known (Romans 2:5), and His children revealed in full majesty (Romans 8:19). -DIVIDER-
-DIVIDER-
The kindred verb ἀποκαλύπτω is used in similar connections. Following the categories given above,-DIVIDER-
(a.) Galatians 1:16; Galatians 3:23; Ephesians 3:5; 1 Peter 1:12. -DIVIDER-
-DIVIDER-
(b.) Matthew 11:25, Matthew 11:27; Matthew 16:17; Luke 10:21, Luke 10:22; 1 Corinthians 2:10; 1 Corinthians 14:30; Philemon 3:15. -DIVIDER-
-DIVIDER-
(c.) Matthew 10:26; Luke 2:35; Luke 12:2; Luke 17:30; Romans 1:17, Romans 1:18; Romans 8:18; 1 Corinthians 3:13; 2 Thessalonians 2:3, 2 Thessalonians 2:6, 2 Thessalonians 2:8; 1 Peter 1:5; 1 Peter 5:1. -DIVIDER-
-DIVIDER-
The word is compounded with ἀπό fromand καλύπτω tocover. Hence, to remove the cover from anything; to unveil. So of Balaam, the Lord opened or unveiled his eyes ( ἀπεκάλυψεν τοὺς ὀφθαλμοὺς : Numbers 22:31, Sept.). So Boaz to Naomi's kinsman: “I thought to advertise thee:” Rev., “disclose it unto thee” ( ἀποκαλύψω τὸ οὖς σου : Rth 4:4 , Sept.). Lit., I will uncover thine ear. -DIVIDER-
-DIVIDER-
The noun ἀποκάλυψις revelationoccurs only once in the Septuagint (1 Samuel 20:30), in the physical sense of uncovering. The verb is found in the Septuagint in Daniel 2:19, Daniel 2:22, Daniel 2:28. -DIVIDER-
-DIVIDER-
In classical Greek, the verb is used by Herodotus (i., 119) of uncovering the head; and by Plato: thus, “reveal ( ἀποκαλύψας ) to me the power of Rhetoric” (“Gorgias,” 460): “Uncover your chest and back” (“Protagoras,” 352). Both the verb and the noun occur in Plutarch; the latter of uncovering the body, of waters, and of an error. The religious sense, however, is unknown to heathenism. -DIVIDER-
-DIVIDER-
The following words should be compared with this: Ὀπτασία avision (Luke 1:22; Acts 26:19; 2 Corinthians 12:1). Ὅραμα avision (Matthew 17:9; Acts 9:10; Acts 16:9). Ὅρασις avision (Acts 2:17; Revelation 9:17. Of visible form, Revelation 4:3). These three cannot be accurately distinguished. They all denote the thing seen or shown, without anything to show whether it is understood or not. -DIVIDER-
-DIVIDER-
As distinguished from these, ἀποκάλυψις includes, along with the thing shown or seen, its interpretation or unveiling. -DIVIDER-
-DIVIDER-
Ἐπιφάνεια appearing(hence our epiphany ), is used in profane Greek of the appearance of a higher power in order to aid men. In the New Testament by Paul only, and always of the second appearing of Christ in glory, except in 2 Timothy 1:10, where it signifies His first appearing in the flesh. See 2 Thessalonians 2:8; 1 Timothy 6:14; Titus 2:13. As distinguished from this, ἀπολάλυψις is the more comprehensive word. An apocalypse may include several ἐπιφάνειαι appearingsThe appearings are the media of the revealings. -DIVIDER-
-DIVIDER-
Φανέρωσις manifestationonly twice in the New Testament; 1 Corinthians 12:7; 2 Corinthians 4:2. The kindred verb φανερόω tomake manifest, is of frequent occurrence. See on John 21:1. It is not easy, if possible, to show that this word has a less dignified sense than ἀποκάλυψις . The verb φανερόω is used of both the first and the second appearing of our Lord (1 Timothy 3:16; 1 John 1:2; 1 Peter 1:20; Colossians 3:4; 1 Peter 5:4). See also John 2:11; John 21:1. -DIVIDER-
-DIVIDER-
Some distinguish between φανέρωσις as an external manifestation, to the senses, but single and isolated; while ἀποκάλυψις is an inward and abiding disclosure. According to these, the Apocalypse or unveiling, precedes and produces the φανέρωσις or manifestation. The Apocalypse contemplates the thing revealed; the manifestation, the persons to whom it is revealed. -DIVIDER-
-DIVIDER-
The Revelation here is the unveiling of the divine mysteries.Of Jesus ChristNot the manifestation or disclosure of Jesus Christ, but the revelation given by Him.To shew ( δεῖξαι )Frequent in Revelation (Revelation 4:1; Revelation 17:1; Revelation 21:9; Revelation 22:1). Construe with ἔδωκεν gavegave him to shew. Compare “I will give him to sit” (Revelation 3:21): “It was given to hurt” (Revelation 7:2): “It was given him to do;” (A.V. “had power to do;” Revelation 13:14).Servants ( δούλοις )Properly, bond-servants. See on Matthew 20:26; see on Mark 9:35.Must ( δεῖ )As the decree of the absolute and infallible God.Shortly come to pass ( γενέσθαι ἐν τάχει )For the phrase ἐν τάχει shortlysee Luke 18:8, where yet long delay is implied. Expressions like this must be understood, not according to human measurement of time, but rather as in 2 Peter 3:8. The idea is, before long, as time is computed by God. The aorist infinitive γενέσθαι is not begin to come to pass, but denotes a complete fulfilment: must shortly come to pass in their entirety. He sent ( ἀποστείλας )See on Matthew 10:2, Matthew 10:16.Signified ( ἐσήμανεν )From σῆμα asign. Hence, literally, give a sign or token. The verb occurs outside of John's writings only in Acts 11:28; Acts 25:27. See John 12:33; John 18:32; John 21:19. This is its only occurrence in Revelation. The word is appropriate to the symbolic character of the revelation, and so in John 12:33, where Christ predicts the mode of His death in a figure. Compare sign, Revelation 12:1.Angel ( ἀγγέλου )Strictly, a messenger. See Matthew 11:10; Luke 8:24; Luke 9:52. Compare the mediating angel in the visions of Daniel and Zechariah (Daniel 8:15, Daniel 8:16; Daniel 9:21; Daniel 10:10; Zechariah 1:19). See on John 1:51.ServantDesignating the prophetic office. See Isaiah 59:5; Amos 3:7; compare Revelation 19:10; Revelation 22:9.JohnJohn does not name himself in the Gospel or in the Epistles. Here “we are dealing with prophecy, and prophecy requires the guarantee of the individual who is inspired to utter it” (Milligan). Compare Daniel 8:1; Daniel 9:2. [source]

Revelation 2:7 I will give [δωσω]
Future active of διδωμι — didōmi as in Revelation 2:10, Revelation 2:17, Revelation 2:23, Revelation 2:26, Revelation 2:28; Revelation 3:8, Revelation 3:21; Revelation 6:4; Revelation 11:3; Revelation 21:6.To eat (παγειν — phagein). Second aorist active infinitive of εστιω — esthiō the tree of life (εκ του χυλου της ζωης — ek tou xulou tēs zōēs). Note εκ — ek with the ablative with παγειν — phagein like our “eat of” (from or part of). From Genesis 2:9; Genesis 3:22. Again in Revelation 22:2, Revelation 22:14 as here for immortality. This tree is now in the Garden of God. For the water of life see Revelation 21:6; Revelation 22:17 (Cf. John 4:10, John 4:13.).Which The χυλον — xulon (tree).In the Paradise of God (εν τωι παραδεισωι του τεου — en tōi paradeisōi tou theou). Persian word, for which see Luke 23:43; 2 Corinthians 12:4. The abode of God and the home of the redeemed with Christ, not a mere intermediate state. It was originally a garden of delight and finally heaven itself (Trench), as here. [source]
Revelation 22:1 A river of water of life [ποταμον υδατος ζωης]
For υδωρ ζωης — hudōr zōēs (water of life) see Revelation 7:17; Revelation 21:6; Revelation 22:17; John 4:14. There was a river in the Garden of Eden (Genesis 2:10). The metaphor of river reappears in Zechariah 14:8; Ezekiel 47:9, and the fountain of life in Joel 3:18; Jeremiah 2:13; Proverbs 10:11; Proverbs 13:14; Proverbs 14:27; Proverbs 16:22; Psalm 36:10.Bright as crystal (λαμπρον ως κρυσταλλον — lampron hōs krustallon). See Revelation 4:6 for κρυσταλλον — krustallon and Revelation 15:6; Revelation 19:8; Revelation 22:16 for λαμπρον — lampron “Sparkling like rock crystal” (Swete), shimmering like mountain water over the rocks.Proceeding out of the throne of God and of the Lamb Cf. Ezekiel 47:1; Zechariah 14:8. Already in Revelation 3:21 Christ is pictured as sharing the Father‘s throne as in Hebrews 1:3. See also Revelation 22:3. This phrase has no bearing on the doctrine of the Procession of the Holy Spirit. [source]
Revelation 22:5 They need [εχουσιν χρειαν]
Present active indicative, “They have need,” though A has εχουσιν — hexousin (shall have), future like εσται — estai Here again there is repetition of part of Revelation 21:23, but for the purpose of showing the delightsomeness of the New Jerusalem with no need of lamp or sun (change to πως — phōs with ηλιου — hēliou instead of πωτος — phōtos “they have no light of sun”).Shall give them light (πωτισει — phōtisei). Future active of πωτιζω — phōtizō while aorist επωτισεν — ephōtisen in Revelation 21:23.They shall reign Future active of βασιλευω — basileuō Reign eternally in contrast with the limited millennial reign of Revelation 20:4, Revelation 20:6. This glorious eternal reign with Christ occurs repeatedly in the book (Revelation 1:6; Revelation 3:21; Revelation 5:10) as in Luke 22:30. Christ‘s Kingdom is spiritual (John 18:36.). “The visions of the Apocalypse are now ended; they have reached their climax in the New Jerusalem” (Swete). Now John gives the parting utterances of some of the speakers, and it is not always clear who is speaking. [source]
Revelation 22:5 They shall reign [βασιλευσουσιν]
Future active of βασιλευω — basileuō Reign eternally in contrast with the limited millennial reign of Revelation 20:4, Revelation 20:6. This glorious eternal reign with Christ occurs repeatedly in the book (Revelation 1:6; Revelation 3:21; Revelation 5:10) as in Luke 22:30. Christ‘s Kingdom is spiritual (John 18:36.). “The visions of the Apocalypse are now ended; they have reached their climax in the New Jerusalem” (Swete). Now John gives the parting utterances of some of the speakers, and it is not always clear who is speaking. [source]
Revelation 3:7 The holy, he that is true [ο αγιοσ ο αλητινος]
Separate articles (four in all) for each item in this description. “The holy, the genuine.” Asyndeton in the Greek. Latin Vulgate, Sanctus et Verus. αγιος — Hosea hagios is ascribed to God in Revelation 4:8; Revelation 6:10 (both αλητινος — hagios and αλητινος — alēthinos as here), but to Christ in Mark 1:24; Luke 4:34; John 6:69; Acts 4:27, Acts 4:30; 1 John 2:20, a recognized title of the Messiah as the consecrated one set apart. Swete notes that αλητης — alēthinos is verus as distinguished from verax So it is applied to God in Revelation 6:10 and to Christ in Revelation 3:14; Revelation 19:11 as in John 1:9; John 6:32; John 15:1.He that hath the key of David (και ουδεις κλεισει — ho echōn tēn klein Daueid). This epithet comes from Isaiah 22:22, where Eliakim as the chief steward of the royal household holds the keys of power. Christ as the Messiah (Revelation 5:5; Revelation 22:16) has exclusive power in heaven, on earth, and in Hades (Matthew 16:19; Matthew 28:18; Romans 14:9; Philemon 2:9.; Revelation 1:18). Christ has power to admit and exclude of his own will (Matthew 25:10.; Ephesians 1:22; Revelation 3:21; Revelation 19:11-16; Revelation 20:4; Revelation 22:16).And none shall shut Charles calls the structure Hebrew (future active indicative of ο ανοιγων — kleiō), and not Greek because it does not correspond to the present articular participle just before και ουδεις ανοιγει — ho anoigōn (the one opening), but it occurs often in this book as in the very next clause, “and none openeth” (κλειων — kai oudeis anoigei) over against κλειει — kleiōn (present active participle, opening) though here some MSS. read kleiei (present active indicative, open). [source]
Revelation 3:7 He that hath the key of David [και ουδεις κλεισει]
This epithet comes from Isaiah 22:22, where Eliakim as the chief steward of the royal household holds the keys of power. Christ as the Messiah (Revelation 5:5; Revelation 22:16) has exclusive power in heaven, on earth, and in Hades (Matthew 16:19; Matthew 28:18; Romans 14:9; Philemon 2:9.; Revelation 1:18). Christ has power to admit and exclude of his own will (Matthew 25:10.; Ephesians 1:22; Revelation 3:21; Revelation 19:11-16; Revelation 20:4; Revelation 22:16). [source]
Revelation 3:14 The beginning of the creation of God [η αρχη της κτισεως του τεου]
Not the first of creatures as the Arians held and Unitarians do now, but the originating source of creation through whom God works (Colossians 1:15, Colossians 1:18, a passage probably known to the Laodiceans, John 1:3; Hebrews 1:2, as is made clear by Revelation 1:18; Revelation 2:8; Revelation 3:21; Revelation 5:13). [source]
Revelation 3:14 The Amen [ο Αμην]
Personal (masculine article) name here alone, though in Isaiah 65:16 we have “the God of Amen” understood in the lxx as “the God of truth” Here applied to Christ. See Revelation 1:5 for ο μαρτυς ο πιστος — ho martus ho pistos (the faithful witness) and Revelation 3:7 for ο αλητινος — ho alēthinos (the genuine), “whose testimony never falls short of the truth” (Swete).The beginning of the creation of God (η αρχη της κτισεως του τεου — hē archē tēs ktiseōs tou theou). Not the first of creatures as the Arians held and Unitarians do now, but the originating source of creation through whom God works (Colossians 1:15, Colossians 1:18, a passage probably known to the Laodiceans, John 1:3; Hebrews 1:2, as is made clear by Revelation 1:18; Revelation 2:8; Revelation 3:21; Revelation 5:13). [source]

What do the individual words in Revelation 3:21 mean?

The [one] overcoming I will give to him to sit with Me on the throne of Me as I also overcame and sat down with the Father of Him
νικῶν δώσω αὐτῷ καθίσαι μετ’ ἐμοῦ ἐν τῷ θρόνῳ μου ὡς κἀγὼ ἐνίκησα καὶ ἐκάθισα μετὰ τοῦ Πατρός αὐτοῦ

  The  [one] 
Parse: Article, Nominative Masculine Singular
Root:  
Sense: this, that, these, etc.
νικῶν  overcoming 
Parse: Verb, Present Participle Active, Nominative Masculine Singular
Root: νικάω  
Sense: to conquer.
δώσω  I  will  give 
Parse: Verb, Future Indicative Active, 1st Person Singular
Root: διδῶ 
Sense: to give.
αὐτῷ  to  him 
Parse: Personal / Possessive Pronoun, Dative Masculine 3rd Person Singular
Root: αὐτός  
Sense: himself, herself, themselves, itself.
καθίσαι  to  sit 
Parse: Verb, Aorist Infinitive Active
Root: καθίζω  
Sense: to make to sit down.
ἐμοῦ  Me 
Parse: Personal / Possessive Pronoun, Genitive 1st Person Singular
Root: ἐγώ  
Sense: I, me, my.
θρόνῳ  throne 
Parse: Noun, Dative Masculine Singular
Root: θρόνος  
Sense: a throne seat.
μου  of  Me 
Parse: Personal / Possessive Pronoun, Genitive 1st Person Singular
Root: ἐγώ  
Sense: I, me, my.
κἀγὼ  I  also 
Parse: Personal / Possessive Pronoun, Nominative 1st Person Singular
Root: κἀγώ  
Sense: and I.
ἐνίκησα  overcame 
Parse: Verb, Aorist Indicative Active, 1st Person Singular
Root: νικάω  
Sense: to conquer.
ἐκάθισα  sat  down 
Parse: Verb, Aorist Indicative Active, 1st Person Singular
Root: καθίζω  
Sense: to make to sit down.
Πατρός  Father 
Parse: Noun, Genitive Masculine Singular
Root: προπάτωρ 
Sense: generator or male ancestor.
αὐτοῦ  of  Him 
Parse: Personal / Possessive Pronoun, Genitive Masculine 3rd Person Singular
Root: αὐτός  
Sense: himself, herself, themselves, itself.