Charles Spurgeon Commentary Philemon 1:11-12

"who once was unprofitable to thee, but now is profitable to thee and to me: whom I have sent back to thee in his own person, that is, my very heart:" — Philemon 1:11-12 (ASV)

Which in time past was to thee unprofitable, but now profitable to thee and to me: whom I have sent again:

"He was your slave, and therefore I have sent him back to you."