yet now I rejoice, not because you were made sorrowful, but because your sorrow led you to repentance. For you felt the sorrow that God had intended, and so were not harmed in any way by us.
KJV
Now I rejoice, not that ye were made sorry, but that ye sorrowed to repentance: for ye were made sorry after a godly manner, that ye might receive damage by us in nothing.
ASV
I now rejoice, not that ye were made sorry, but that ye were made sorry unto repentance; for ye were made sorry after a godly sort, that ye might suffer loss by us in nothing.