It is from among such individuals that all human failures spring.

All failures are so because they lack social interest.

Men of genius are admired, men of wealth are envied, men of power are feared; but only men of character are trusted.

It is one of the most effective attitudes of the neurotic to measure thumbs down, so to speak, a real person by an ideal, since in doing so he can depreciate him as much as he wishes.

Every individual acts and suffers in accordance with his peculiar teleology, which has all the inevitability of fate, so long as he does not understand it.

There is only one reason for an individual to side-step to the useless side : the fear of a defeat on the useful side.

Mathematics is pure language - the language of science. It is unique among languages in its ability to provide precise expression for every thought or concept that can be formulated in its terms.