An understanding of the natural world is a source of not only great curiosity, but great fulfilment.

Be frank and explicit. That is the right line to take when you wish to conceal your own mind and to confuse the minds of others.

If you only read the books that everyone else is reading, you can only think what everyone else is thinking.

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

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

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

None but ourselves can free our minds.

We are all born ignorant, but one must work hard to remain stupid

Empty pockets never held anyone back. Only empty heads and empty hearts can do that.

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

What's real and what's true aren't necessarily the same.

To a wise and good man the whole earth is his fatherland.

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

We choose our joys and sorrows long before we experience them.

The best way to see Faith is to shut the eye of Reason.

I hear and I forget. I see and I remember. I do and I understand.

The heart has its reasons which reason knows not.

It is a cliche that most cliches are true, but then like most cliches, that cliche is untrue.

Attitude, not Aptitude, determines Altitude.

Resist much. Obey little.

Good means not merely not to do wrong, but rather not to desire to do wrong.