Reaper Man (Discworld, #11; Death, #2)

by Terry Pratchett

YOU DON’T UNDERSTAND, said Bill Door. TO TINKER WITH THE FATE OF ONE INDIVIDUAL COULD DESTROY THE WHOLE WORLD. Miss Flitworth looked at him as if he had gone mad. “What kind of garbage is that?” I MEAN THAT THERE IS A TIME FOR EVERYONE TO DIE.