A mistake is always forgivable, rarely excusable and always unacceptable.

The impossible could not have happened, therefore the impossible must be possible in spite of appearances.

Judge a man by his questions rather than by his answers.

The ultimate authority must always rest with the individual's own reason and critical analysis.

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

For beautiful eyes, look for the good in others; for beautiful lips, speak only words of kindness; and for poise, walk with the knowledge that you are never alone.

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

Adapt what is useful, reject what is useless, and add what is specifically your own.

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

You don't become what you want, you become what you believe

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

It is tact that is golden, not silence.

All that we see or seem is but a dream within a dream.

Yesterday I was clever, so I wanted to change the world. Today I am wise, so I am changing myself.

We never see ourselves as others see us.

We learn from our gardens to deal with the most urgent question of the time: How much is enough?

The greatest power we have is the power of choice.

It has seemed to be more necessary to have regard to the weight of words rather than to their number.

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

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

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