Two wrongs don't make a right, but they make a good excuse.
The stupid neither forgive nor forget; the naive forgive and forget; the wise forgive but do not forget.
The system isn't stupid, but the people in it are.
When a person can no longer laugh at himself, it is time for others to laugh at him.
There is no psychology; there is only biography and autobiography.
People often say that this or that person has not yet found himself. But the self is not something one finds, it is something one creates.
A child becomes an adult when he realizes that he has a right not only to be right but also to be wrong.
Formerly, when religion was strong and science weak, men mistook magic for medicine; now, when science is strong and religion weak, men mistake medicine for magic.
Every act of conscious learning requires the willingness to suffer an injury to one's self-esteem. That is why young children, before they are aware of their own self-importance, learn so easily.
Doubt is to certainty as neurosis is to psychosis. The neurotic is in doubt and has fears about persons and things; the psychotic has convictions and makes claims about them. In short, the neurotic has problems, the psychotic has solutions.
Happiness is an imaginary condition, formerly often attributed by the living to the dead, now usually attributed by adults to children, and by children to adults.
Clear thinking requires courage rather than intelligence.
He who does not accept and respect those who want to reject life does not truly accept and respect life itself.
Boredom is the feeling that everything is a waste of time; serenity, that nothing is.
Adulthood is the ever-shrinking period between childhood and old age. It is the apparent aim of modern industrial societies to reduce this period to a minimum.