[But] if he hath wronged thee [at all]. It would have been needlessly irritating to Philemon to go into the details of Onesimus's offences. No doubt St. Paul had had an account of them from the repentant youth, but he had far too much tact to occupy himself and Philemon in the discussion of details.
The hypothetic form avoids the whole of these. It suffices that he assumes the responsibility of repayment. Owes thee anything. As a matter of moral right at the bar of conscience. For in a secular court the slave could be neither debtor nor creditor, properly speaking, as against his master.
This offence was probably embezzlement or purloining while in service. A, C, D*, F, G, א read (elloga), reckon it to me.