2 Corinthians 7:8 For though I made you sorry with a letter, I do not repent, though I did repent: for I perceive that the same epistle hath made you sorry, though it were but for a season.

MacDonald observed well, “When the Corinthians first read his letter, it came as a rebuke to them, and they were pained. After sending the letter, the apostle anticipated their reaction to it, and this made him sorry. Not that he was conscious of having done any wrong; that is not the thought here at all. Rather he was sorry that in carrying out his work for the Lord, it was necessary that others should at times be cast into unhappiness temporarily in order that God’s purposes might be worked out in their lives.”