The price of civilization is instinctual renunciation.

To endure life remains, when all is said, the first duty of all living being Illusion can have no value if it makes this more difficult for us.

In human beings pure masculinity or femininity is not to be found either in a psychological or biological sense.

Cigars served me for precisely fifty years as protection and a weapon in the combat of life... I owe to the cigar a great intensification of my capacity to work and a facilitation of my self-control.

Where id was, there ego shall be.

Where they love they do not desire and where they desire they do not love.

The more the fruits of knowledge become accessible to men, the more widespread is the decline of religious belief.