“Time is there for a purpose, to keep things in order. Once you change chronology you change history. The past could eat up the present . . .”
“Waking, after all, was an almost natal state. You surfaced without history, then spent the blinks and yawns reassembling your past, shuffling the shards into chronological order before fortifying yourself for the present.”
“Among the things Billy Pilgrim could not change were the past, the present, and the future.”
“The only thing you can change about the past is how you feel about it in the present.”
“You cannot change the past. All you can do is change the way you allow the past to affect your present and future.”
“You can’t change the past. You can’t even change the future, in the sense that you can only change the present one moment at a time, stubbornly, until the future unwinds itself into the stories of our lives.”