As quoted in The Crusades Through Arab Eyes (1984) by Amin Maalouf, p. 37
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, <!-- probably because of a misreading of that article --> and later to Averroes, in The Atheist World (1991) by Madalyn Murray O'Hair, p. 46.