Abu ‘Ali al-Husayn ibn Sīnā Archives

More Generally: Historical Thinkers (296)

December 14, 2018

Ibn Sīnā and Descartes on the Nature of Body

Thus, a body is such an entity that, if one posits a longitude on it, another longitude will be found intersecting it at a right angle, and a third longitude of these two lengths will stand as a perpendicular on the point of the previous intersection. Whatever can be placed under these three magnitudes in the aforesaid manner and is also a substance is called a body ... But that which is in a body, such as length, width, and depth, is known to exist not in the form of the body, but as an accident to it. For instance,...
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