John Chrysostom

"Ye look at the things that are before your face." Behold here also prudence. For having rebuked those that deceived them, he confined not his remarks to them, but he leaps away from them to these too; and he does so constantly. For, in truth, he scourgeth not those only that lead astray, but the deceived also. For had he let even them go without calling them to an account, they would not so easily have been reformed by what was said to the others; but would have been greatly elated even, as not being amenable to accusations. …

Homily 22 on 2 Corinthians ↗

Theophylact of Ohrid

Not only does he frighten the deceivers, but he also rebukes the deceived; therefore he says: recognize by their deeds who is arrogant, who is rich, who hides behind a mask of virtue. The false apostles boasted that they were Christ's and supposedly eyewitnesses of the Word. "Of himself" he said instead of: let him not wait for our exposure against him, but let him consider for himself that precisely because he is Christ's, he has no advantage over us. For I too cannot be an apostle of anyone else, even if he were Christ's. …

Commentary on 2 Corinthians ↗

Thomas Aquinas

Above, the Apostle excused himself by reason; here he excuses himself by the evidence of the fact. In this regard he does two things. First, he submits his excuse to his hearers to judge; secondly, he pursues his cause (v. 7b). He says therefore: although reason shows that the charge laid against me by the false apostles is false, nevertheless, if some among you are not convinced by reason and refuse to acquiesce to it, at least look at, i.e., consider, the things that are before your eyes, i.e., that are evident, concerning me. …

Commentary on 2 Corinthians ↗