A clever person solves a problem. A wise person avoids it.

Speak only if it improves upon the silence.

Live as if you were to die tomorrow. Learn as if you were to live forever.

Remembering that I'll be dead soon is the most important tool I've ever encountered to help me make the big choices in life. Because almost everything — all external expectations, all pride, all fear of embarrassment or failure - these things just fall away in the face of death, leaving only what is truly important. Remembering that you are going to die is the best way I know to avoid the trap of thinking you have something to lose. You are already naked. There is no reason not to follow your heart.

A leader leads by example not by force.

Success is going from failure to failure without a loss of enthusiasm.

He who is not contented with what he has, would not be contented with what he would like to have.

I do not know with what weapons World War III will be fought, but World War IV will be fought with sticks and stones. Letter to Harry S. Truman.

An eye for an eye will make the whole world blind.

Of all the words of mice and men, the saddest are 'It might have been.'