After His Resurrection, Our Lord appears among the Apostles and three times asks Peter if he loves Him. As Peter answers each question with an affirmation of his love, Our Lord utters the three phrases: "Feed My lambs," "Feed My lambs," "Feed My Sheep" (Jn 21:16-17). Taking any one of these episodes, we must see that the function entrusted to Peter was very great; taking them all together, we see it is enormous. In the first, he is to be the rock upon whom the Church (which Our Lord here calls also the kingdom of heaven) is to be founded. He is to have supremacy in the kingdom, for Our Lord promised him the "keys" which are a symbol of supremacy; and he is to have a final power of regulation and discipline, for his permissions and prohibitions are to be ratified in heaven. At the Last Supper, something is made explicit which before was certainly present but implicitly. He is to safeguard the unity of the brethern, whom otherwise Satan would scatter like chaff, because by the prayer of God his own faith would not fail, would be unfailable--which brings us to the very word infallibility. The third is the richest of all. Peter is shepherd the whole flock, the little ones and the great. He is to feed them. With what food? The spirit of man needs three kinds of food and Our Lord came to provide them. "Man does not live by bread alone, but by every word that proceeds from the mouth of God." So truth is food. "My meat is to do the Will of Him that sent Me." So law is food. 'The food I shall give is My flesh for the life of the world." So sacrament is food. Peter must feed the flock with truth and law and sacrament.