"640 kb ought to be enough for everybody." 

Bill Gates during the good old DOS days

"The price of liberty is eternal vigilance."

Thomas Jefferson

"If... history teaches us anything, it is that man in his quest for knowledge and progress, is determined and cannot be deterred."

John F. Kennedy, Address at Rice University (1962)

“Life takes its own turns and makes its own demands, writes its own story. And along the way, we start to realize we are not the author; ...; We begin to understand that life is ours to live, but not to waste, and that the greatest rewards are found in the commitments we make with our whole hearts to the people we love and to the causes that earn our sacrifice.”

George W. Bush, at Yale University while accepting the honorary degree (05/21/2001)

"If past history was all there was to the game, the richest people would be librarians."

Warren Buffett

"Reports that say that something hasn't happened are always interesting to me, because as we know, there are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns -- the ones we don't know we don't know."

Donald Rumsfeld, at a press briefing in Feb 2002 on the hunt for Iraq's weapons of mass destruction