But we must not forget that only a very few people are artists in life; that the art of life is the most distinguished and rarest of all the arts.

Nothing is possible without love ... For love puts one in a mood to risk everything.

Space flights are merely an escape, a fleeing away from oneself, because it is easier to go to Mars or to the moon than it is to penetrate one's own being.

If there is anything that we wish to change in the child, we should first examine it and see whether it is not something that could better be changed in ourselves.

Even a happy life cannot be without a measure of darkness and the word 'happiness' would lose its meaning if it were not balanced by sadness.

The more intelligent and cultured a man is, the more subtly he can humbug himself.

Even a lie is a psychic fact.

Who looks outside dreams; who looks inside wakes.

One looks back with appreciation to the brilliant teachers, but with gratitude to those who touched our human feeling. Curriculum is necessary raw material, but warmth is the vital element for the growing plant and for the soul of the child.

The educated man tries to repress the inferior one in himself, without realizing that by this he forces the latter to become revolutionary.