The Kingdom of God is Within You by Leo Tolstoy Chapter 5 Page 56

Not to speak of all the other contradictions between modern life and the conscience, the permanently armed condition of Europe together with its profession of Christianity is alone enough to drive any man to despair, to doubt of the sanity of mankind, and to terminate an existence in this senseless and brutal world.

This contradiction, which is a quintessence of all the other contradictions, is so terrible that to live and to take part in it is only possible if one does not think of it — if one is able to forget it.

What! all of us, Christians, not only profess to love one another, but do actually live one common life; we whose social existence beats with one common pulse — we aid one another, learn from one another, draw ever closer to one another to our mutual happiness,