John Chrysostom

"As unknown, and yet well known." This is, "by glory and dishonor." For by some they were well known and much sought after, whilst others designed not to know them at all. "As dying, and behold, we live." As under sentence of death and condemned; which was itself also matter of dishonor. But this he said, to show both the unspeakable power of God and their own patience. For so far as those who plotted against us were concerned, we died; and this is what all suppose; but by God's aid we escaped the dangers. …

Homily 12 on 2 Corinthians ↗

Theophylact of Ohrid

"We are unknown, yet we are recognized": for some they were respected and well-known, while for others they were not even worthy of being known. This corresponds to what was said: "in honor and dishonor." "They regard us as dead, but behold, we are alive": that is, as those condemned and sentenced to death, and, in the opinion of those who plot against us, already dead; but by the power of God we are alive. …

Commentary on 2 Corinthians ↗

Thomas Aquinas

Then he discusses the things which pertain to the concupiscence of the flesh and mentions three things which the flesh desires: first, it desires a long life; as to this he says, as dying, i.e., although we are exposed to the dangers of death: "And often near death" (2 Cor. 11:23), and behold we live in virtue and faith. Therefore, Hab. (2:4) says: "But the righteous live by their faith"; "I shall not die, but I shall live" (Ps. 118:17). Secondly, it desires health and repose; as to this he says, as punished and yet not killed. …

Commentary on 2 Corinthians ↗