Geometry enlightens the intellect and sets one's mind right.
Quotes from Muqaddimah vol. 3 — Ibn Khaldun
Attribution
Quotes and notes from Wikiquote: Ibn Khaldun (page history), available under CC BY-SA 4.0.
Quotes and notes from Wikiquote: Ibn Khaldun (page history), available under CC BY-SA 4.0.