Be polite to all, friendly to none. Be professional. Be ready to kill everyone and everything.
War is all and king of all
If, as Niko asks, you show them mercy, then the gods will be well pleased.
There must be a corps that will battle for righteousness, for there are endless battalions who serve unrighteousness.
Sometimes a man does what he'd most like to avoid.
Revenge is never the best driver for a battle, but a common one.