They said therefore to him, "What must we do, that we may work the works of God?"

 For one thing, they were eager to support Jesus when he gave them what they wanted. He had healed them and fed them; and they would thereupon have made him their leader. There is such a thing as a bought loyalty. There is such a thing as cupboard love. Dr. Johnson, in one of his more cynical moments, defined gratitude as "a lively sense of favours still to come." 