"Therefore what reward shall I give unto the Lord for all the benefits which He hath done unto me? In the first creation He gave me myself; but in His new creation He gave me Himself, and by that gift restored to me the self that I had lost. Created first and then restored, I owe Him myself twice over in return for myself. But what have I to offer Him for the gift of Himself? Could I multiply myself a thousand-fold and then give Him all, what would that be in comparison with God?"

Bernard of Clairvaux, On Loving God