Instead I pondered and sought in myself what I might repay to the Lord in compensation for this knowledge of the truth which the Lord manifested to me. I understood, of course, that the eternal nature and ruler of all things stands in need of nothing. Consequently I found one thing only which was fitting for me to offer God, namely, that I should believe that it is never possible for him to receive anything from a man, but only to give.

Commentary on Romans, books 1-5