Neither in my private life nor in my writings, have I ever made a secret of being an out-and-out unbeliever.

It is easy to see that the ego is that part of the id which has been modified by the direct influence of the external world.

Words and magic were in the beginning one and the same thing, and even today words retain much of their magical power.

One thing only do I know for certain and that is that man's judgments of value follow directly his wishes for happiness-that, accordingly, they are an attempt to support his illusions with arguments. [p.111]

The price we pay for our advance in civilization is a loss of happiness through the heightening of the sense of guilt.

It is a mistake to believe that science consists in nothing but conclusively proved propositions, and it is unjust to demand that it should. It is a demand made by those who feel a craving for authority in some form to replace the religious catechism by something else, even a scientific one.

It is a great injustice to persecute homosexuality as a crime, and cruelty too