Those who fail to understand history are doomed to retake the class.
One of the lessons of history is that nothing is often a good thing to do and always a clever thing to say. - Will Durant
Qui desiderat pacem, bellum praeparat; nemo provocare ne offendere audet quem intelliget superiorem esse pugnaturem. (Whosoever desires peace prepares for war; no one provokes, nor dares to offend, those who they know know to be superior in battle.) - Flavius Vegetius Renatus, in “De re militari” (390 C.E.)
