Don't live in the past. There's no point. You can't change anything. What a waste of time.
Bob NewhartSome novelists want to give people in history a voice because they have been denied it in the past.
Antony BeevorJust because something's been good in the past doesn't mean it will continue to be good.
David ChangYour future takes precedence over your past. Focus on your future, rather than on the past.
Gary Ryan BlairIn the future as in the past, both Clausewitz and Sun Tzu will undoubtedly have a lot to offer.
Martin Van Creveld