Billy didn’t really have it. Rumfoord simply insisted, for his own comfort, that Billy had it. Rumfoord was… — Kurt Vonnegut

Billy had a framed prayer on his office wall which expressed his method for keeping going, even though he was unenthusiastic about living. A lot of patients who saw the prayer on Billy's wall told him that it helped them to keep going, too. It went like this: "God grant me the serenity to accept the things I cannot change, courage to change the things I can, and wisdom always to tell the difference."

Among the things Billy Pilgrim could not change were the past, the present, and the future. (p. 60)

As part of the gun crew, he had helped to fire one shot in anger — from a 57-millimeter antitank gun. The gun made a ripping sound like the opening of the zipper on the fly of God Almighty. The gun lapped up snow and vegetation with a blowtorch thirty feet long. The flame left a black arrow on the ground, showing the Germans exactly where the gun was hidden. The shot was a miss. (p. 34)

I have told my sons that they are not under any circumstances to take part in massacres, and that the news of massacres of enemies is not to fill them with satisfaction or glee.

I have also told them not to work for companies which make massacre machinery, and to express contempt for people who think we need machinery like that. (p. 19)