It would be one of the greatest triumphs of humanity, one of the most tangible liberations from the constraints of nature to which mankind is subject, if we could succeed in raising the responsible act of procreating children to the level of a deliberate and intentional activity and in freeing it from its entanglement with the necessary satisfaction of a natural need.

It is a predisposition of human nature to consider an unpleasant idea untrue, and then it is easy to find arguments against it.

You wanted to kill your father in order to be your father yourself. Now you are your father, but a dead father.

Dreams are the guardians of sleep and not its disturbers.

A strong egoism is a protection.

In the depths of my heart I can’t help being convinced that my dear fellow-men, with a few exceptions, are worthless.

So in every individual the two trends, one towards personal happiness and the other unity with the rest of humanity, must contend with each other.