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

It takes a lot of courage to show your dreams to someone else.

I think, therefore I am.

Where you stand depends on where you sit.

Strength does not come from physical capacity. It comes from an indomitable will.

There is always time to add a word, never to withdraw one.

If you're happy, don't worry you'll get over it.

Having a great intellect is no path to being happy.

Anywhere you go in the world is what you make of it, not what you read in books.

A friend to all is a friend to none

A single lie destroys a whole reputation of integrity.

No one cares how much you know, until they know how much you care

Do not deny the classical approach, simply as a reaction, or you will have created another pattern and trapped yourself there.

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

It is better to remain silent and be thought a fool than to open one's mouth and remove all doubt.

Nothing is so strong as gentleness, nothing so gentle as real strength

Not everything that can be counted counts, and not everything that counts can be counted.

Nature is pleased with simplicity. And nature is no dummy

Man is not the creature of circumstances, Circumstances are the creatures of men.

The most courageous act is still to think for yourself. Aloud.

Throw your heart over the fence and the rest will follow.