Mathematical Quotations -- I


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Ibn Khaldun (1332-1406)

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.
The Muqaddimah. An Introduction to History.


Isidore of Seville (ca 600 ad)

Take from all things their number and all shall perish.


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