All failures are so because they lack social interest.

To be a human being means to possess a feeling of inferiority which constantly presses towards its own conquest. The greater the feeling of inferiority that has been experienced, the more powerful is the urge for conquest and the more violent the emotional agitation.

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.

My difficulties belong to me!

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.

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.