“It’s a hell of a thing, killing a man. Take away all he’s got and all he’s ever gonna have.”
There’s more: Kill a man and you send him to his judgment, ready or not. This is no small thing.
Best scene ever (Dirty Harry?) is when he’s standing on the psycho-kidnapper guy in Kezar stadium just after he shot him in the leg. The guy says “You tried to kill me”, and he replies, “If I tried to kill you, your brains would be splattered across this field” All. Time. Best!