João 21
Ambrose of Milan · Comentário Patrístico (catena)
João 21:15
It is Peter, chosen by the Lord himself to feed his flock, who merits three times to hear the words "Feed my little lambs; feed my lambs; feed my sheep." And so, by feeding well the flock of Christ with the food of faith, he effaced the sin of his former fall. For this reason he is admonished three times to feed the flock. He is asked three times whether he loves the Lord in order that he may confess him three times whom he had denied three times before his crucifixion. — Exposition of the Christian Faith 5, PROLOGUE 2
João 21:23
There is, then, nothing for us to fear in death, nothing for us to mourn, whether life, which was received from nature be rendered up to it again, or whether it is sacrificed to some duty that claims it, and this will be either an act of religion or the exercise of some virtue. And no one ever wished to remain as at present. This has been supposed to have been promised to John, but it is not the truth. We hold fast to the words and deduce the meaning from them. He himself in his own writing denies that there was a promise that he should not die, that no one from that instance might yield to an empty hope. But if to wish for this would be an extravagant hope, how much more extravagant would it be to grieve without rule for what has happened according to rule! — On the Death of Satyrus 2.49