“Religion is a psychic disease of the brain.”
1900s, God Does Not Exist (1904)
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Benito Mussolini 127
Duce and President of the Council of Ministers of Italy. Le… 1883–1945Related quotes

Before showing test footage from the movie The Lost World, based upon his novel, as a trick at the annual meeting of the Society of American Magicians in 1922. The New York Times ran a story the next day: DINOSAURS CAVORT IN FILM FOR DOYLE SPIRITIST MYSTIFIES WORLD-FAMED MAGICIANS WITH PICTURES OF PREHISTORIC BEASTS — KEEPS ORIGIN A SECRET — MONSTERS OF OTHER AGES SHOWN, SOME FIGHTING, SOME AT PLAY, IN THEIR NATIVE JUNGLES
Context: These pictures are not occult, but they are psychic because everything that emanates from the human spirit or human brain is psychic. It is not supernatural; nothing is. It is preternatural in the sense that it is not known to our ordinary senses. It is the effect of the joining on the one hand of imagination, and on the other hand of some power of materialization. The imagination, I may say, comes from me — the materializing power from elsewhere.

As quoted in The Crusades Through Arab Eyes (1984) by Amin Maalouf, p. 37
Variant translations:
The world holds two classes of men; intelligent men without religion, and religious men without intelligence.
A Short History of Freethought Ancient and Modern (1906) by John Mackinnon Robertson, Vol. I, Ch. VIII: Freethought under Islam, p. 269
The world is divided into men who have wit and no religion and men who have religion and no wit.
This form of the statement has been most commonly misatributted — to Avicenna, in A Rationalist Encyclopaedia: A Book of Reference on Religion, Philosophy, Ethics, and Science (1950) by Joseph McCabe, p. 43, and later to Averroes, in The Atheist World (1991) by Madalyn Murray O'Hair, p. 46.
Original: اِثْنَانِ أَهْلُ الْأَرْضِ ذُو عَقْلٍ بِلَا دِينٍ وَآخَرُ دَيِّنٌ لَا عَقْلَ لَهُ

Source: The Limits of Evolution, and Other Essays, Illustrating the Metaphysical Theory of Personal Ideaalism (1905), Human Immortality: its Positive Argument, p.295

“Religion: Benito a Christian?” Time magazine (August 25, 1924)
1920s

“Religion is a species of mental disease. It has always had a pathological reaction on mankind.”
As quoted by Mussolini in 2000 Years of Disbelief: Famous People with the Courage to Doubt by James A. Haught (1966) p. 256. From a speech he made in Lausanne, July 1904.
1900s

“I regard [religion] as a disease born of fear and as a source of untold misery to the human race.”
1930s, Has Religion Made Useful Contributions to Civilization? (1930)

"To the Indianapolis Clergy." The Iconoclast (Indianapolis, IN) (1883)
Context: But whatever theories we have, we have at last to be governed by the facts. We are in a world where vice, deformity, weakness, and disease are hereditary. In the presence of this immense and solemn truth rises the religion of the body. Every man should refuse to increase the misery of this world.