A wise man fights to win, but he is twice a fool who has no plan for possible defeat.

No one can get an education, for of necessity education is a continuing process.

At the earliest drawings of the fractal curve, few clues to the underlying mathematical structure will be seen.

I wonder why it is the man who pleads for mercy never gives it.

A book is valuable not only for what it says but for what it makes you think, or causes you to remember. No matter what you wish to do or become there are books to teach you, help you, guide you.

There is no man more dangerous than one who does not doubt his own rightness.

Dogma is invariably wrong, as knowledge is always in a state of transition.