War should be the only study of a prince. He should consider peace only as a breathing-time, which gives him leisure to contrive, and furnishes as ability to execute, military plans.
Niccolo MachiavelliAlthough deceit is detestable in all other things, yet in the conduct of war it is laudable and honorable; and a commander who vanquishes an enemy by stratagem is equally praised with one who gains victory by force.
Niccolo MachiavelliFrom the latter he is defended by being well armed and having good allies, and if he is well armed he will have good friends, and affairs will always remain quiet within when they are quiet without, unless they should have been already disturbed by conspiracy; and even should affairs outside be disturbed, if he has carried out his preparations and has lived as I have said, as long as he does not despair, he will resist every attack.
Niccolo Machiavelli