8 For though I should boast somewhat more of our authority, which the Lord hath given us for edification, and not for your destruction, I should not be ashamed:
Paul ascribes his gift to God and points out that it was given for the common good. His work of answering arguments, detecting what is unsound and laying the proper foundation is all intended for the upbuilding of the community. But if anybody is hostile and wants to do battle with him, he also has the power to answer arguments and will use it as and when it is appropriate to do so.
For though I should glory somewhat abundantly concerning our authority which the Lord gave for building you up, and not for casting you down, I shall not be put to shame.
For since he was going to say somewhat great, observe how he softens it. For nothing does so offend the majority of hearers as for any one to praise himself. Wherefore to cut at the root of this offensiveness, he says, "For though I should glory somewhat abundantly." And he did not say, 'if any man trust that he is Christ's let him think that he is far short of us. For I possess much authority from Him, so as to punish and to kill whomsoever I choose;' but what? "For though I should glory even somewhat abundantly." And yet he possessed more than can be told, but nevertheless he lowers it in his way of speaking. And he said not, 'I glory,' but, "if I should glory," if I should choose to do so: at once both showing modesty, and declaring his superiority. If therefore he says, "I should glory concerning the authority which the Lord gave me." Again, he ascribes the whole to Him, and makes the gift common. "For building up, and not for casting down." Do you see how again he allays the envy his praises might give rise to, and draws the hearer over to himself by mentioning the use for which he received it? Then why does he say, "Casting down imaginations?" Because this is itself a special form of building up, the removing of hindrances, and detecting the unsound, and laying the true together in the building. For this end therefore we received it, that we might build up. But if any should spar and battle with us, and be incurable, we will use that other power also, destroying and overthrowing him. Wherefore also he says, "I shall not be put to shame," that is, I shall not be proved a liar or a boaster.
[AD 407] John Chrysostom on 2 Corinthians 10:8