In this way only we attain to what is not to say difficult but altogether against nature, to love those that hate us, render good for evil, and blessing for cursing, remembering that we are not to reflect on the wickedness of men, but look to the image of God in them, an image which, covering and obliterating their faults, should by its beauty and dignity allure us to love and embrace them.

—John Calvin, Institutes of the Christian Religion, 3.7.6 (Beveridge transl.)