The only limit to our realization of tomorrow will be our doubts of today.

Where there is anger, there is always pain underneath.

All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.

The road of excess leads to the palace of wisdom.

Nothing fixes a thing so intensely in the memory as the wish to forget it.

Stubborn and ardent clinging to one's opinion is the best proof of stupidity.

You cannot truly listen to anyone and do anything else at the same time.

One of the truest tests of integrity is its blunt refusal to be compromised.

Experience is merely the name men gave to their mistakes.

A good teacher protects his pupils from his own influence.

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.

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

Challenges are gifts that force us to search for a new center of gravity. Don't fight them. Just find a new way to stand.

The use of travelling is to regulate imagination by reality, and instead of thinking how things may be, to see them as they are.

Experience is the only prophecy of wise men.

Don't raise your voice, improve your argument.

It is always advisable to perceive clearly our ignorance.

And this sensitivity will create new friendships for you - friendships with trees, with birds, with animals, with mountains, with rivers, with oceans, with stars. Life becomes richer as love grows.

The greatest of all mistakes is to do nothing because you think you can only do a little

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

Our virtues and our failings are inseparable, like force and matter. When they separate, man is no more