For a disciple of Jesus, in each case the decision hinges upon the answer to the question, Is it Christian? Is it a thing that Jesus could do without sin? Is it in harmony with his teaching and desires? Can it be followed without violating his way of life? Is it such that he can use it, sanction it and bless it? If the devout monk had decided the question solely upon these grounds, he should not have used torture to conquer the heretic, the judge should not have used the stake to silence witches, the politician should not adopt the evil practices of his opponent, and if the Christian citizen uses this same test, he should not, in my opinion, use the sword in resisting the military despot.

Ch.6 p. 95 - The Sword or the Cross, Which Should be the Weapon of the Christian Militant? (1921)