" THE CROWN OF CHRISTIAN ETHICS IS THE DOCTRINE OF forgiveness. In it the whole genius of prophetic religion is expressed. Love as forgiveness is the most difficult and impossible of moral achievements. Yet it is a possibility if the impossibility of love is recognized and the sin in the self is acknowledged. Therefore an ethic culminating in an impossible possibility produces its choicest fruit in terms of the doctrine of forgiveness, the demand that the evil in the other shall be borne without vindictiveness because the evil in the self is known. "

― Reinhold Niebuhr , An Interpretation of Christian Ethics