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For if I make you sorry,.... That is, should he come among them, and be the means of fresh grief and sorrow:

who is he then that maketh me glad? such was his love and affection for them, and sympathy with them, that should they be grieved, he should grieve also; they were the only persons he could take any delight in at Corinth; wherefore should they be in heaviness, he would be so too, and then what pleasure would he have in being among them? since not a man of them would be in a condition and capacity to make him cheerful:

but the same which is made sorry by me. The Ethiopic version without any authority reads this clause, "except he whom I have made glad"; but the apostle is to be understood either of some particular man, the incestuous person, who had been made sorry, by that awful punishment of being delivered up to Satan, inflicted on him; or else the singular number being put for the plural collectively, is to be understood of all the members of the church at Corinth, who had been greatly grieved by the sharp reproofs he had given them; and therefore unless this trouble was removed, he could not expect to have much comfort and pleasure with them.

For if I make you sorry - “If when I should come among you, I should be called on to inflict sorrow by punishing your offending brethren by an act of severe discipline as soon as I came, who would there be to give me comfort but those very persons whom I had affected with grief? How little prepared would they be to make me happy, and to comfort me, amidst the deep sorrow which I should have caused by an act of severe discipline. After such an act - an act that would spread sorrow through the whole church, how could I expect that comfort which I should desire to find among you. The whole church would be affected with grief; and though I might be sustained by the sound part of the church, yet my visit would be attended with painful circumstances. I resolved, therefore, to remove all cause of difficulty, if possible, before I came, that my visit might be pleasant to us all.” The idea is, that there was such a sympathy between him and them; that he was so attached to them, that he could not expect to be happy unless they were happy; that though he might be conscious he was only discharging a duty, and that God would sustain him in it, yet that it would mar the pleasure of his visit, and destroy all his anticipated happiness by the general grief.