Religious illusion must bow to scientific truth. It is in total error about the nature of the true world. Only science is not an illusion.

The liberty of the individual is no gift of civilization. It was greatest before there was any civilization, though then, it is true, it had for the most part no value, since the individual was scarcely in a position to defend it. The development of civilization imposes restrictions on it, and justice demands that no one shall escape those restrictions.

Life as we find it is too hard for us; it entails too much pain, too many disappointments, impossible tasks. We cannot do without palliative remedies.

Civilization began the first time an angry person cast a word instead of a rock.

Dreams are the royal road to the unconscious.

The news that reaches your consciousness is incomplete and often not to be relied on.... Turn your eyes inward, look into your own depths, learn first to know yourself!

Plaque was placed on 6 May 1977 at Bellevue (a house on the slopes of the Wienerwald) where the Freud family spent their summers.