"Unlimited power is apt to corrupt the minds of those who possess it;
 and this I know, my lords, that where laws end, tyranny begins."
 - William Pitt the Elder, 1770

"Power tends to corrupt, and absolute power corrupts absolutely.
 Great men are almost always bad men."
 - Lord Acton, 1887

"You can give a man office, but you can’t give him discretion."
 - Ben Franklin

"You can have power over people as long as you don't
 take everything from them." - Alexander Solzhenitsyn

"My relationship to power and authority is that I'm all for it.  People
 need somebody to watch over them.  Ninety-five percent of the people in
 the world need to be told what to do and how to behave."
 - Arnold Schwarzenegger 

"The worst pain a man can suffer: to have insight into much and
 power over nothing." - Herodotus