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Ibn Sina's Remarks and Admonitions: Physics and MetaphysicsAn Analysis and Annotated Translation$
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Print publication date: 2014

Print ISBN-13: 9780231166164

Published to Columbia Scholarship Online: November 2015

DOI: 10.7312/columbia/9780231166164.001.0001

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Supplement to the [Third] Class (P. 431)

Supplement to the [Third] Class (P. 431)

On Expositing the Movements Produced by the Soul

(p.111) Supplement to the [Third] Class (P. 431)
Ibn Sina's Remarks and Admonitions: Physics and Metaphysics

Shams Inati

Columbia University Press

In this Supplement to the Third Class, Ibn Sina talks about the powers of the soul that produce the human actions and movements. He discusses the branches of the plant powers and their acts. These powers are said to be three: nutritive, growth, and reproductive. The plant movements or acts of nutrition, growth, and reproduction are involuntary and evidence the existence of these powers. The plant power on which the other two depend is the nutritive power whose life term is the longest of the three and continues to the end of the life of the individual. Contrary to that, the growth power terminates first among the three, followed by the reproductive power whose function is to preserve the species. Ibn Sina also considers animal powers with voluntary movements and advances the idea that the propensity celestial bodies have for circular motion is evidence that this motion is animated and voluntary. He concludes by exploring the notion of volition.

Keywords:   soul, movements, plant powers, nutrition, growth, reproduction, animal powers, celestial bodies, volition, Ibn Sina

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