The psychical, whatever its nature may be, is itself unconscious.

Conscience is the internal perception of the rejection of a particular wish operating within us.

A civilization which leaves so large a number of its participants unsatisfied and drives them into revolt neither has nor deserves the prospect of a lasting existence.

I have no concern with any economic criticisms of the communist system; I cannot inquire into whether the abolition of private property is expedient or advantageous. But I am able to recognize that the psychological premisses on which the system is based are an untenable illusion. In abolishing private property we deprive the human love of aggression of one of its instruments... but we have in no way altered the differences in power and influence which are misused by aggressiveness.

In the last analysis the entire field of psychology may reduce to biological electrochemistry.

What good to us is a long life if it is difficult and barren of joys, and if it is so full of misery that we can only welcome death as a deliverer?

The voice of the intellect is soft one, but it does not rest until it has gained a hearing. Ultimately, after endless rebuffs, it succeeds. This is one of the few points in which one may be optimistic about the future of mankind.