You place too much importance... on the so-called purity of blood! You fail to recognize that it matters not what someone is born, but what they grow to be!

I hear and I forget. I see and I remember. I do and I understand.

I believe that one defines oneself by reinvention. To not be like your parents. To not be like your friends. To be yourself. To cut yourself out of stone.

Instinct is a marvellous thing. It can neither be explained nor ignored.

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.

There is nothing more uncommon than common sense.

To kill an error is as good a service as, and sometimes even better than, the establishing of a new truth or fact

Bitterness is like cancer. It eats upon the host. But anger is like fire. It burns it all clean.

The more skilled you are at something, the worse you are at it when showing someone.

When you learn, teach, when you get, give.

Tomorrow hopes we have learned something from yesterday.

Beauty is not in the face; beauty is a light in the heart.

If you don't stand for something you will fall for anything.

The first method for estimating the intelligence of a ruler is to look at the men he has around him.

If a man could have half of his wishes, he would double his troubles.

Drop the idea that you are Atlas carrying the world on your shoulders. The world would go on even without you. Don't take yourself so seriously.

But the fact that some geniuses were laughed at does not imply that all who are laughed at are geniuses. They laughed at Columbus, they laughed at Fulton, they laughed at the Wright brothers. But they also laughed at Bozo the Clown.

Rational discussion is useful only when there is a significant base of shared assumptions.

The smaller the mind, the greater the conceit.

Don't compromise yourself. You are all you've got.

A perfection of means, and confusion of aims, seems to be our main problem.