" He nodded and dabbed at his forehead with his sleeve. “And every mistake. But every good thing we do as well. They are immortal, every single touch we leave behind. Even if nobody sees them or remembers them, that doesn’t matter. That trail will always be what happened, what we did, every choice. The past lives on forever. There’s no changing it. "

― Hugh Howey , Dust (Silo, #3)