The first book that really knocked me out was the 'Brothers Karamazov.' I read it when I was a senior in high school.
The right of a nation to kill a tyrant in case of necessity can no more be doubted than to hang a robber, or kill a flea.
There are a lot of times that if a detail in a scene or a beat, feels unnatural, they'll allow me to explore another direction to go until we're all comfortable with what we are doing.