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.

 Jesus' answer was twofold. First, he reminded them that it was not Moses who had given them the manna; it was God. Second, he told them that the manna was not really the bread of God; it was only the symbol of the bread of God. The bread of God was he who came down from heaven and gave men not simply satisfaction from physical hunger, but life. Jesus was claiming that the only real satisfaction was in him. 