The Kingdom of God is Within You by Leo Tolstoy Chapter 12 Page 63

I have often inquired of different soldiers. And I always drove them to embarrassment and confusion by reminding them of what they did not want to think about. They knew they were bound by the law of God, “Thou shalt not kill,” and knew too that they were bound by their duty as soldiers, but had never reflected on the contradiction between these duties. The drift of the timid answers I received to this question was always approximately this: that killing in war and executing criminals by command of the government are not included in the general prohibition of murder. But when I said this distinction was not made in the law of God, and reminded them of the Christian duty of fraternity, forgiveness of injuries, and love, which could not be reconciled with murder, the peasants usually agreed, but in their turn began to ask me questions.