Jesus therefore said to them, "Most assuredly, I tell you, it wasn't Moses who gave you the bread out of heaven, but my Father gives you the true bread out of heaven.
The true bread that Jesus came to give was his flesh and blood offered in sacrifice. Unless people eat and drink this ‘food’ they cannot be saved. That is, unless they accept Jesus’ sacrifice for themselves in faith, they cannot have eternal life, either now or in the future (John 5:52-59).