"Never test the depth of river with..." - Quote by Warren Buffett

“If principles can become dated, they're not principles.”

“When they get their ego involved, people do things they shouldn't do.”

“If we start deciding, based on guesses or emotions, whether we will or won't participate in a business where we should have some long run edge, we're in trouble.”

“The financial calculus that Charlie and I employ would never permit our trading a good night's sleep for a shot at a few extra percentage points of return. I've never believed in risking what my friends and family have and need in order to pursue what they don't have and don't need.”

“The less prudence with which others conduct their affairs, the greater the prudence with which we should conduct our own affairs.”

“The three most important words in investing...Margin of Safety.”

“Have more than thou showest, Speak less than thou knowest, Lend less than thou owest.”

“Prudence in action avails more than wisdom in conception.”

“The better part of valor is discretion, in the which better part I have saved my life.”