As soon as you trust yourself, you will know how to live.

Those who want to live, let them fight, and those who do not want to fight in this world of eternal struggle do not deserve to live.

I don't need you to remind me of my age. I have a bladder to do that for me.

A wise girl kisses but doesn't love, listens but doesn't believe, and leaves before she is left.

If we couldn't laugh we would all go insane.

You can find the entire cosmos lurking in its least remarkable objects.

Concision in style, precision in thought, decision in life.

The scientists of today think deeply instead of clearly. One must be sane to think clearly, but one can think deeply and be quite insane.

Do not erase the designs the child makes in the soft wax of his inner life.

What would life be if we had no courage to attempt anything?

We cannot live better than in seeking to become better.

Live a balanced life - learn some and think some and draw some and paint some and sing and dance and play and work everyday some.

Shame is an ornament to the young; a disgrace to the old.

History repeats itself, first as tragedy, second as farce.

The desire to fly is an idea handed down to us by our ancestors who... looked enviously on the birds soaring freely through space... on the infinite highway of the air

What goes up must come down.

Life can be pulled by goals just as surely as it can be pushed by drives.

Let silence take you to the core of life.

It takes a long time to grow young.

Take care of your body. It's the only place you have to live.

We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology.