If the Christian penitent dares to ask that his many departures from the Christian norm, his impatience, gloom, self-occupation, unloving prejudices, reckless tongue, feverish desires, with all the damage they have caused to Christ's Body, be set aside, because -- because, in spite of all, he longs for God and Eternal Life: then he must set aside and forgive all that the impatience, selfishness, bitter and foolish speech, and sudden yieldings to base impulse by others have caused him to endure. Hardness is the one impossible thing. Harshness to others in those who ask and need the mercy of God sets up a conflict at the very heart of personality and shuts the door upon grace.
— Evelyn Underhill
Christianity