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 goes on: "My words are spirit and life." He alone can tell us what life is, put into us the spirit in which it must be lived, give us the strength so to live it. Life takes its value from its purpose and its goal. Christ alone can give us true purpose in life, and the power to work out that purpose against the constant opposition that comes from without and within. 