John 21:16,17

The lambs and the sheep of our Saviour here mean the faithful, who compose his Church, without any distinction of Jew or Gentile. St. Peter, by these words, is appointed to take charge of the whole flock, as being the chief and prince of the apostles. He is, in some manner, the pastor, not of the sheep only, but of the pastors themselves. They have each their own flock to look after; but to him is committed the care of all; he alone is the pastor of all. (Calmet) --- Feed my sheep. Our Lord had promised the spiritual supremacy to St. Peter; (St. Matthew xvi. 19.) and here he fulfils that promise, by charging him with the superintendency of all his sheep, without exception; and consequently of his whole flock, that is, of his whole Church. (Challoner)