Albert Barnes Commentary John 6:58

"This is the bread which came down out of heaven: not as the fathers ate, and died; he that eateth this bread shall live for ever." — John 6:58 (ASV)

This is that bread, and so on. This is the true bread that came down. The word "that" should not be in the translation.

Shall live for ever. Not on the earth, but in the enjoyments of a better world.