It is impossible to overlook the extent to which civilization is built upon a renunciation of instinct.

Were we fully to understand the reasons for other people's behavior, it would all make sense.

I should like to raise the question whether the inevitable stunting of the sense of smell as a result of man's turning away from the earth, and the organic repression of the smell-pleasure produced by it, does not largely share in his predisposition to nervous diseases.

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.

The rest of our enquiry is made easy because this God-Creator is openly called Father. Psycho-analysis concludes that he really is the father, clothed in the grandeur in which he once appeared to the small child.

Experience teaches that for most people there is a limit beyond which their constitution cannot comply with the demands of civilization. All who wish to reach a higher standard than their constitution will allow, fall victims to neurosis. It would have been better for them if they could have remained less "perfect".

The poor ego has a still harder time of it; it has to serve three harsh masters, and it has to do its best to reconcile the claims and demands of all three...The three tyrants are the external world, the superego, and the id.