This is that (better, the) bread which came down... i.e., of this nature, which He has expounded from John 6:32 onwards. The tense is now in the past, pointing to His historic coming, because He has asserted that He is the bread. (Comp. John 6:33; John 6:38.)
Not as your fathers did eat manna, and are dead. — Read, with the best MSS., not as your fathers did eat, and are dead.
The discourse ends with that which has been the text of it.