João 21
Bede
João 21:1
[(as quoted by Aquinas, AD 1274)] The Evangelist, after his wont, first states the thing itself, and then says how it took place: And on this wise showed He Himself. — Catena Aurea by Aquinas
João 21:7-8
[(as quoted by Aquinas, AD 1274)] The Evangelist alludes to himself here the same way he always does. He recognised our Lord either by the miracle, or by the sound of His voice, or the association of former occasions on which He found them fishing. Peter was naked in comparison with the usual dress he wore, in the sense in which we say to a person whom we meet thinly clad, You are quite bare. Peter was hare for convenience sake, as fishermen are in fishing. He went to Jesus with the ardour with which he did every thing: And did cast himself into the sea. And the other disciples came in a little ship. We must not understand here that Peter walked on the top of the water, but either swam, or walked through the water, being very near the land: For they were not far from land, but as it were about two hundred cubits. By the two hundred cubits is signified the twofold grace of love; the love of God and the love of our neighbour; for by them we approach to Christ. The fish broiled is Christ Who suffered. He deigned to be hid in the waters of human nature, and to be taken in the net of our night; and having become a fish by the taking of humanity, became bread to refresh us by His divinity. — Catena Aurea by Aquinas
João 21:16
Peter also restrained himself in this inquiry of our Lord's by answering cautiously, for he remembered earlier on, when Christ's passion was drawing near, he had attributed greater constancy to himself than he possessed. — Homilies on the Gospels 2.22
João 21:17
What [Christ] said to [Peter] at this point, "Feed my sheep," was surely the same thing that he had said to him more clearly before his passion, "But I have asked on your behalf that your faith may not fail you, and once you have recovered, strengthen your brothers." To feed Christ's sheep is to strengthen those who believe in Christ, lest their faith fail them, and to devote oneself ceaselessly [to seeing to it] that they may make greater and greater progress in their faith. However, we must look carefully at the fact that his feeding of the Lord's flock is not to be carried out with one single approach but should rather be multifaceted. A director must diligently see to it that earthly necessities are not lacking to his subjects and also be careful in providing them with examples of virtues along with words of preaching.… When those who are under his care may perhaps themselves have fallen into error, he as a righteous person should, according to the word of the psalmist, "accuse them mercifully and rebuke them," but he should not soothe their hearts with the oil of harmful approval. This too is one of the obligations of a pious shepherd. — Homilies on the Gospels 2.22