One of the lessons of history is that nothing is often a good thing to do and alwaysa clever thing to say.

What isthe shortest word in the English language that contains the letters: abcdef? Answer: feedback. Don't forget that feedback isone of the essential elements of good communication.

The difficulty of speeches is what you are perpetually poised between the ciche and the indiscretion

Maturityis the capacity to endure uncertainty.

At times, it is better to keep your mouth shut and let people wonder if you are a fool than to open it and remove all doubt.

Kindwords can be short and easy to speak, but their echoes are truly endless.

The oldbelieve everything, the middle-aged suspect everything, the young knoweverything.

The fundamental concept in social science is Power, in thesame sense in which Energy is the fundamental concept in physics.

Changemeans movement. Movement means friction. Only in the frictionless vacuum of anonexistent abstract world can movement or change occur without that abrasivefriction of conflict.

Thegalleries are full of critics. They play no ball, they fight no fights. Theymake no mistakes because they attempt nothing. Down in the arena are thedoers. They make mistakes because they try many things. The man who makes nomistakes lacks boldness and

Can we do good to the world? In an absolute sense, no; in a relative sense, yes.

The real purpose of books is to trap the mind into doing its own thinking