This is that bread which came down from heaven: not as your fathers did eat manna, and are dead: he that eats of this bread shall live forever.
All Commentaries on John 6:58 Go To John 6
John Chrysostom
AD 407
Continually does He handle the same point, so as to imprint it on the understanding of the hearers, (for the teaching on these points was a kind of final teaching,) and to confirm the doctrine of the Resurrection and of eternal life. Wherefore He mentions the Resurrection since He promises eternal life, showing that that life is not now, but after the Resurrection. And whence, says some one, are these things clear? From the Scriptures; to them He everywhere referrs the Jews, bidding them learn these things from them. And by saying, Which gives life to the world, He incites them to jealousy, that from very vexation that others should enjoy the gift, they may not stay without. And continually He reminds them of the manna, showing the difference, (between it and His bread,) and guiding them to the faith; for if He was able to support their life for forty years without harvest, or grain, or other things in course; much more now will He be able to do so, as having come for greater ends. Moreover, if those things were but types, and yet men collected what came down without sweat or labor; much more shall this be the case, where the difference is great both in the never dying, and in the enjoying the true life. And rightly has He spoken often of life, since this is desired by men, and nothing is so pleasing to them as not to die. Since even under the old Covenant, this was the promise, length of life and many days, but now it is not length merely, but life having no end. He desires at the same time to show, that He now revokes the punishment caused by sin, annulling that sentence which condemns to death, and bringing in not life merely, but life eternal, contrariwise to the former things.