Religious doctrines … are all illusions, they do not admit of proof, and no one can be compelled to consider them as true or to believe in them.

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

But the less a man knows about the past and the present the more insecure must prove to be his judgment of the future.

Long ago man formed an ideal conception of omnipotence and omniscience which he embodied in his gods. Whatever seemed unattainable to his desires - or forbidden to him - he attributed to these gods... Now he has himself approached very near to realizing this ideal, he has nearly become a god himself.

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

Much of our highly valued cultural heritage has been acquired at the cost of sexuality.

The only shame in masturbation is the shame of not doing it well.