Thoughts without content are empty, intuitions without concepts are blind.

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

Let there be spaces in your togetherness.

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

Jealousy is the tribute mediocrity pays to genius.

I wanted to change the world. But I have found that the only thing one can be sure of changing is oneself.

You can best serve civilization by being against what usually passes for it.

Out of suffering have emerged the strongest souls; the most massive characters are seared with scars.

There are no eternal facts, as there are no absolute truths.

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

Thought can be so seductive and hypnotic that it absorbs your attention totally, so you become your thoughts.

Intelligence is the ability to adapt to change.

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.

How often it is that the angry man rages denial of what his inner self is telling him.

Knowing is not enough, we must apply. Willing is not enough, we must do.

If you would take, you must first give, this is the beginning of intelligence.

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

Time wounds all heels.

Learned we may be with another man's learning: we can only be wise with wisdom of our own.

The first thing you'll have to do, is the last thing you wished.

There is geometry in the humming of the strings. There is music in the spacing of the spheres.