On the next day, the multitude that stood on the other side of the sea saw that there was no other boat there, except the one in which his disciples had embarked, and that Jesus hadn't entered with his disciples into the boat, but his disciples had gone away alone.
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).