John 6:33

the bread of God is he which Better, the bread of God is that which. Christ has not yet identified Himself with the Bread; it is still impersonal, and hence the present participle in the Greek. Contrast John 6:41. There is a clear reference to this passage in the Ignatian Epistles, RomansVII. The whole chapter is impregnated with the Fourth Gospel. See on John 4:10.

giveth life unto the world Without this Bread mankind is spiritually dead; and this is the point of the argument (the introductory -for" shews that the verse is argumentative): we have proof that it is the Father who gives the really heavenly Bread, forit is His Bread that quickens the whole human race.