This he said to test him, for he himself knew what he would do.

 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. 