Ibn Khaldun Quotes
Geometry enlightens the intellect and sets one's mind right. All of its proofs are very clear and orderly. It is hardly possible for errors to enter into geometrical reasoning, because it is well arranged and orderly. Thus, the mind that constantly applies itself to geometry is not likely to fall into error. In this convenient way, the person who knows geometry acquires intelligence.
Khaldun, Ibn. The Muqaddimah: An Introduction to History. Translated by Franz Rosenthal, vol. 3, Princeton University Press, 1958, p. 130.
Feynman generally emphasized the importance of a scientist understanding the mathematics of his/her subject, especially where nature's complexities abounded. At the time few appreciated the importance in the biological sciences of mathematics which we know today is so essential.
Ibn Khaldun was an Arab sociologist, philosopher and historian who has been described as the founder of the modern disciplines of historiography, sociology, economics, and demography. Niccolò Machiavelli of the Renaissance and the 19th-century European scholars widely acknowledged the significance of his works and considered Ibn Khaldun to be one of the greatest philosophers of the Middle Ages.