Now he derives the necessity of this from the precautions that must be taken in view of the false apostles.
By "those who desire occasion" he means the false apostles. Here occasion is αφορμη, a pretext, opportunity, or occasion. The false apostles used every opportunity to present both Saint Paul himself and his preaching in an unfavorable light, and thereby to hinder the success of the Gospel. Therefore, he says, I do this so that my opponents, if I received anything from you, would not turn this into an occasion to harm the Gospel of Christ. "I do this because of many opponents, cutting off from them occasions to speak evil of us" (Theodoret). "Since the false apostles cared only to find some pretext, it was necessary to take even this away from them" (Chrysostom).
But how Saint Paul's opponents could have used it as a weapon against him if he had received anything from the Corinthians, Paul does not state precisely. He only hints at it in the words, "that in what they boast of, they may be found just as we are." The thought is given that the false apostles were already boasting of their disinterestedness. The Apostle says: foreseeing this, I took nothing from you and thereby cut off from them the opportunity to boast. Now they can no longer boast, since they have nothing special over me. But if I had taken something, they could boldly say: we take nothing, but he takes. Listen to us, not to him. He acts from motives of gain.
Yet it is difficult to suppose that the false apostles could act without self-interest. Therefore the word "boast" does not mean that they possess disinterestedness, but that they merely assume the appearance of disinterested men, without being so in deed. The Apostle speaks as though saying: I feared that, having assumed the mask of disinterested men, they might scandalize you. Now let them cover themselves with the mask as they wish. With all their contrivance they will only reach the point at which I already stand. The implication is that in other respects they are far beneath me. Therefore I may think that by this manner of acting I cut off every success for them among you.
Blessed Theodoret does not merely suppose, but directly affirms, that they only wore the mask of disinterestedness. The Apostle showed that they magnify themselves in words, but secretly collect money. For he says this shortly afterward: "You endure it if someone enslaves you, if someone devours you, if someone takes advantage of you" (2 Cor 11:20). To this one must add that, since the Apostle began to act so disinterestedly before knowing how the enemies of the truth would oppose him, the words "that in what they boast" can be understood in this sense. If they should begin to boast of their disinterestedness, or should begin to act without taking payment, they would show no advantage over me, but would be found only like me.
It is not superfluous to recall that there were philosophical sects in Corinth. Many philosophers assumed the appearance of men detached from visible goods and thereby influenced their followers. Was it not this circumstance that disposed the Apostle to show in himself the face of one truly detached from everything? He taught heavenly philosophy for this one reason alone: that people might follow it and thereby acquire for themselves the true good, not temporal but eternal.