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.

For if I make you sorry - Should he have come and used his apostolical authority, in inflicting punishment upon the transgressors, this would have been a common cause of distress. And though he might expect that the sound part of the Church would be a cause of consolation to him, yet as all would be overwhelmed with trouble at the punishment of the transgressors, he could not rejoice to see those whom he loved in distress.

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--proof that he shrinks from causing them sorrow ("heaviness").
if I--The "I" is emphatic. Some detractor may say that this (2-Corinthians 2:1) is not my reason for not coming as I proposed; since I showed no scruple in causing "heaviness," or sorrow, in my Epistle (the first Epistle to the Corinthians). But I answer, If I be the one to cause you sorrow, it is not that I have any pleasure in doing so. Nay, my object was that he "who was made sorry by me" (namely, the Corinthians in general, 2-Corinthians 2:3; but with tacit reference to the incestuous person in particular) should repent, and so "make me glad," as has actually taken place; "for . . . who is he then that?" &c.

For if I grieve you, who is he that cheereth me, but he that is grieved by me - That is, I cannot be comforted myself till his grief is removed.