Half the world is composed of people who have something to say and can't, and the other half who have nothing to say and keep on saying it.
What's done can't be undone.
I hear and I forget. I see and I remember. I do and I understand.
I've learned that people will forget what you said, people will forget what you did, but people will never forget how you made them feel.
Every act of creation is first an act of destruction.
You can best serve civilization by being against what usually passes for it.
A wise man can learn more from a foolish question than a fool can learn from a wise answer.
There are no limitations to the mind except those we acknowledge.
Learn from the mistakes of others. You can never live long enough to make them all yourself.
And no one will listen to us until we listen to ourselves.
The heart has its reasons which reason knows not.
Rational discussion is useful only when there is a significant base of shared assumptions.
All the great things are simple, and many can be expressed in a single word: freedom; justice; honor; duty; mercy; hope.
Dark and difficult times lie ahead. Soon we must all face the choice between what is right and what is easy.
What a man does for others, not what they do for him, gives him immortality.
Those who can not change their minds can not change anything.
Destiny is not a passive agent that lies in the lap of the Gods, but is an active instrument that lies in your own hands to shape as you will.
Jealousy is the tribute mediocrity pays to genius.
There is always time to add a word, never to withdraw one.
Never do anything when you are in a temper, for you will do everything wrong.
Immoderate desire is the mark of a child, not a man.