"Do you ever think about the war", this quote shows the reversal of Billy's mindset throughout the book. If people have to ask him if he ever thinks about the war he fought in and was writing about, than how much does the war affect Billy? A good quote that shows how much Billy has changed throughout the war is "so it goes". This appears whenever someone in the story dies or is mentioned with death. I think this shows how much Billy has changed. When going into the war, he was young, faithful, and naive. But as the war ended, it didn't end in Billy's mind. He had false realities being created by his mind to cope with the endless tragedy of war. He had even created a saying that only he would understand, that death can't be changed, in the same way war can never change, because war and death aren't separated in Billy's mind. Because the first time he witnessed death was in the war, any other death reminds him of the war. Billy even didn't know his children well, because to him they were all fighting the war with him. Another quote shows that he doesn't want his children to take part in massacres. Later on his son becomes a green beret, so it goes. Its a sense of irony that Billy can't change war or death, but chooses to accept it. So the question remains "what does war change?" how can something that cannot change, change people? War changed Billy Pilgrim, but Billy accepts that he cannot change war. I believe that this shows the incongruity and reversals that the author writes in the story. To conclude, questions still remain "What does war change?" but war never changes for Billy Pilgrim, war only changes him.