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.

It is well known that those who do not trust themselves never trust others.

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

The educator must believe in the potential power of his pupil, and he must employ all his art in seeking to bring his pupil to experience this power.

We must interpret a bad temper as a sign of inferiority.

Each generation has its few great mathematicians, and mathematics would not even notice the absence of the others. They are useful as teachers, and their research harms no one, but it is of no importance at all. A mathematician is great or he is nothing.

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.