2 Corinthians 11:31-33
“The God and Father of the Lord Jesus knows that I lie not. The Governor under Aretas the king guarded the city of the Damascenes, desiring to apprehend me.”
What can be the reason that he here strongly confirms and gives assurance of [his truth], seeing he did not so in respect to any of the former things? Because, perhaps, this was of older date and not so well known; while of those other facts, his care for the churches, and all the rest, they were themselves cognisant. See then how great the war [against him] was, since on his account the city was “guarded.” And when I say this of the war, I say it of the zeal of Paul; for except this had breathed intensely, it had not kindled the governor to so great madness. These things are the part of an apostolic soul, to suffer so great things and yet in nothing to veer about, but to bear nobly whatever befalls; yet not to go out to meet dangers, nor to rush upon them. See for instance here, how he was content to evade the siege, by being “let down through a window in a basket.” For though he were even desirous “to depart hence;” still nevertheless he also passionately affected the salvation of men. And therefore he ofttimes had recourse even to such devices as these, preserving himself for the Preaching; and he refused not to use even human contrivances when the occasion called for them; so sober and watchful was he. For in cases where evils were inevitable, he needed only grace; but where the trial was of a measured character, he devises many things of himself even, here again ascribing the whole to God. And just as a spark of unquenchable fire, if it fell into the sea, would be merged as many waves swept over it, yet would again rise shining to the surface; even so surely the blessed Paul also would now be overwhelmed by perils, and now again, having dived through them, would come up more radiant, overcoming by suffering evil.
Source: Homilies on Second Corinthians (New Advent)