Wikiquote no longer allows unsourced quotations, and they are in process of being removed from our pages (see Wikiquote:Limits on quotations); but if you can provide a reliable, precise and verifiable source for any quote on this list please move it to Arthur Koestler. --Antiquary 17:53, 17 September 2009 (UTC)
- "The more original a discovery, the more obvious it seems afterward."
- "The most persistent sound which reverberates through man's history is the beating of war drums."
- "Creative activity could be described as a type of learning process where teacher and pupil are located in the same individual."
- "A publisher who writes is like a cow in a milk bar."
- "Courage is never to let your actions be influenced by your fears.
- "If the creator had a purpose in equipping us with a neck, he surely meant us to stick it out."
- "The offspring in the marriage of Eros and Logos is tolerance"
- "Nothing is more sad than the death of an illusion."
- "Politics can be relatively fair in the breathing spaces of history; at its critical turning points there is no other rule possible than the old one, that the end justifies the means."
- "Scientists are peeping toms at the keyhole of eternity."
- "The principle mark of genius is not perfection but originality, the opening of new frontiers."
- "True creativity often starts where language ends."
- "Prometheus is reaching out for the stars with an empty grin on his face."
- "Creativity in science could be described as the act of putting two and two together to make five" (cf Orwell, in 1984)
- "Nobody before the Pythagorean had thought that mathematical relations held the secret of the universe. Twenty-five centuries later, Europe is still blessed and cursed with their heritage. To non-European civilizations, the idea that numbers are the key to both wisdom and power, seems never to have occurred."
- "When all is said, its atmosphere [England's] still contains fewer germs of aggression and brutality per cubic foot in a crowded bus, pub or queue than in any other country in which I have lived"
- "When a person identifies himself with a group his critical faculties are diminished and his passions enhanced by a kind of emotive resonance. The individual is not a killer, the group is, and by identifying with it, the individual becomes one. This is the infernal dialect reflected in man's history."
- "Two half-truths do not make a truth, and two half-cultures do not make a culture."
- The more original a discovery, the more obvious it seems afterward.