John Chrysostom
Next, since he had said, "We are the fragrance of Christ to God among those being saved and among those perishing," he added this so that you may not think those perishing are also pleasing to God.
"To the one a fragrance from death to death, and to the other a fragrance from life to life" (2 Cor 2:16). That is, when they smell this fragrance, some are saved and others perish.
Yet if anyone perishes, he himself is the cause of his perdition. For fragrant myrrh, they say, suffocates swine, and light, as I said before, blinds those weak in sight.
Such is the property of good things: they not only perfect what is akin to them, but also destroy what is opposed. In this latter case their power is especially manifested.
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So fire is shown to be fire, and reveals its proper power, not only when it gives light or purifies gold, but still more when it burns thorns.
Christ too will reveal His greatness when "He will slay the Antichrist with the breath of His mouth and destroy him by the manifestation of His coming" (2 Thess 2:8).
"And who is sufficient for these things?" Since the Apostle had said many great and extraordinary things, calling himself both a sacrifice and the fragrance of Christ, and ascribing universal triumph to himself, he again strives to moderate what he said.
He refers all this to God. Therefore he says: "And who is sufficient for these things?" "All this," he says, "belongs to Christ, and nothing is ours."
Do you see his difference from the false apostles? They boast that they bring something of their own to the preaching of Christ. He, on the contrary, counts it his boast that he calls nothing his own.
"For our boast is this," he says, "the testimony of our conscience, that in simplicity and godly sincerity, not by fleshly wisdom but by the grace of God, we conducted ourselves in the world" (2 Cor 1:12).
As they counted the acquisition of earthly wisdom as their boast, so he, on the contrary, counts ignorance of it as his boast.
Therefore here too he says: "And who is sufficient for these things?" If we are insufficient for this by ourselves, then everything that happens with us and through us is the work of grace.