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.

We are not determined by our experiences, but are self-determined by the meaning we give to them; and when we take particular experiences as the basis for our future life, we are almost certain to be misguided to some degree. Meanings are not determined by situations. We determine ourselves by the meanings we ascribe to situations.

In the investigation of a neurotic style of life, we must always suspect an opponent, and note who suffers most because of the patient's condition. Usually this is a member of the family.

Violence as a way of gaining power... is being camouflaged under the guise of tradition, national honor [and] national security.

The science of the mind can only have for its proper goal the understanding of human nature by every human being, and through its use, brings peace to every human soul.

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

We cannot say that if a child is badly nourished he will become a criminal. We must see what conclusion the child has drawn.