¹⁹ I, Paul, am writing with my own hand. I will repay--not to mention to you that you owe me even your own self besides.

¹⁹ I, Paul , am writing this with my own hand , I will repay it ( not to [1]mention to you that you owe to me even your own self as well ).

¹⁹ I, Paul, write this with my own hand: I will repay it (not to mention to you that you owe to me even your own self besides).