War is not a courtesy but the most horrible thing in life; and we ought to understand that, and not play at war. We ought to accept this terrible necessity sternly and seriously. It all lies in that: get rid of falsehood and let war be war and not a game. As it is now, war is the favourite pastime of the idle and frivolous.
Bk. X, ch. 25 - War and Peace (1865–1869)