Jesus charged these Galileans with unbelief as He had formerly charged the Judean residents of Jerusalem with it ( John 5:36-38). They had seen Him physically, and on the physical level they had concluded that He might be the predicted Prophet. However, they had not seen who He was spiritually. They did not believe that He was the divine Messiah. Physical sight and spiritual insight are two different things. [source][source][source]
Context Summary
John 6:30-40 - The Father's Will Jesus' Law Of Life
On the day following, our Lord had to encounter, first the demand of the people for a continuation of the miracle of the preceding night, John 6:25-40; second, the murmur of "the Jews," that is, their religious leaders, John 6:41-51; third, the growing heat of His opponents, John 6:52-59; and lastly, the failure of many of His disciples, John 6:60-71. But His mountain prayer had prepared Him, John 6:15.
The manna was only a type of His mission to meet the hunger of the human spirit for truth, and love, and hope. He is the true bread from heaven, God's best gift (of the reality of which all material substances are but emblems), not only satisfying passing hunger but imparting life, and only waiting to be appropriated by any that will. Let us come to Him, turning from all else. To come is to cease to hunger, to trust is to lose our thirst. Jesus suffices for heaven; shall he not suffice also for earth? Note the identical clauses of John 6:37. All whom the Father gives to Christ come to Him; and all who come to Him prove that they are included in the Father's gift, bestowed before the worlds were made. See John 10:28-29; John 17:6. [source]
Chapter Summary: John 6
1Jesus feeds five thousand men with five loaves and two fishes 15Thereupon the people would have made him king; 16but withdrawing himself, he walks on the sea to his disciples; 26reproves the people flocking after him, and all the fleshly hearers of his word; 32declares himself to be the bread of life to believers 66Many disciples depart from him 68Peter confesses him 70Judas is a devil
Greek Commentary for John 6:36
That ye have seen me [οτι και εωρακατε με] It is not certain that με me is genuine. If not, Jesus may refer to John 6:26. If genuine, some other saying is referred to that we do not have. Note και kai (also or even). And yet believe not Use of και kai = and yet. [source]
But [] Though you have seen as you asked, I repeat what I said to you that you have seen and do not believe. [source]
Reverse Greek Commentary Search for John 6:36
John 6:40Seeth [θεωρῶν] The word is designedly used. The saving vision of Christ is not here seeing, but earnest contemplation. Rev., beholdeth. See on John 1:18. Compare ye have seen me, and believe not (John 6:36). [source]
What do the individual words in John 6:36 mean?
ButI saidto youthatalsoyou have seenMeand yetnotbelieve
Parse: Verb, Present Indicative Active, 2nd Person Plural
Root: πιστεύω
Sense: to think to be true, to be persuaded of, to credit, place confidence in.
Greek Commentary for John 6:36
It is not certain that με me is genuine. If not, Jesus may refer to John 6:26. If genuine, some other saying is referred to that we do not have. Note και kai (also or even). And yet believe not Use of και kai = and yet. [source]
Though you have seen as you asked, I repeat what I said to you that you have seen and do not believe. [source]
Reverse Greek Commentary Search for John 6:36
The word is designedly used. The saving vision of Christ is not here seeing, but earnest contemplation. Rev., beholdeth. See on John 1:18. Compare ye have seen me, and believe not (John 6:36). [source]