Generosity is giving more than you can, and pride is taking less than you need.

I think, therefore I am.

If we can really understand the problem, the answer will come out of it, because the answer is not separate from the problem.

If you don't behave as you believe, you will end by believing as you behave.

Sometimes you will never know the value of a moment until it becomes a memory.

Be sure you put your feet in the right place, then stand firm.

Each problem that I solved became a rule which served afterwards to solve other problems.

Creativity is the process of having original ideas that have value.

Forget not that the earth delights to feel your bare feet and the winds long to play with your hair.

Don't raise your voice, improve your argument.

There is an art, or rather a knack to flying. The knack lies in learning how to throw yourself at the ground and miss.

The greatest minds are capable of the greatest vices as well as of the greatest virtues.

It was a melancholy secret that reality can arouse desires but never satisfy them.

Where you stand depends on where you sit.

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

In anger we should refrain both from speech and action.

Things which matter most must never be at the mercy of things which matter least.

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

Be silent or let thy words be worth more than silence.

Confidence is contagious. So is lack of confidence.

Let him who would move the world first move himself.