Wonder is the beginning of wisdom.

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

He that cannot reason is a fool. He that will not is a bigot. He that dare not is a slave.

Science may set limits to knowledge, but should not set limits to imagination.

The one you buy will be the only one that doesn't work.

As the soft yield of water cleaves obstinate stone, So to yield with life solves the insolvable: To yield, I have learned, is to come back again.

Promises are like crying babies in a theater, they should be carried out at once.

A person who spends more than he earns is a fool

There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self.

No man has any natural authority over his fellow men.

Common sense is in spite of, not as the result of education.

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.

If you have no problems, then you have no clue to what is going.

The simple things are also the most extraordinary things, and only the wise can see them.

Language is very powerful. Language does not just describe reality. Language creates the reality it describes.

Everything excellent is as difficult as it is rare.

Good advice is always certain to be ignored, but that's no reason not to give it.

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

Achievement brings its own anticlimax.

When I stand before God at the end of my life, I would hope that I would not have a single bit of talent left, and could say, 'I used everything you gave me'.

I dream. Sometimes I think that's the only right thing to do.