We are what we are because we have been what we have been.

The behavior of a human being in sexual matters is often a prototype for the whole of his other modes of reaction in life.

I was making frequent use of cocaine at that time ... I had been the first to recommend the use of cocaine, in 1885, and this recommendation had brought serious reproaches down on me.

A certain degree of neurosis is of inestimable value as a drive, especially to a psychologist.

When a man is freed of religion, he has a better chance to live a normal and wholesome life.

The voice of reason is small, but very persistent.

Love is a state of temporary psychosis.