Jesus said to them, "I am the bread of life. He who comes to me will not be hungry, and he who believes in me will never be thirsty.

 Here the argument becomes specifically Jewish in its expression and assumptions and allusions. Jesus had just made a great claim. The true work of God was to believe in him. "Very well," said the Jews, "this is in effect a claim to be the Messiah. Prove it." 