• Book Title:
 Avicennas Psychology
  • Book Author:
AvicennaF. Rahman
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Avicenna’s Psychology – Book Sample

The Vegetative Soul – Avicenna’s Psychology

THEN the elements are mixed together in a more harmonious way, i.e. in a more balanced proportion than in the cases previously mentioned, other beings also come into existence out of them due to the powers of the heavenly bodies. The first of these are plants.

Now some plants are grown from seed and set aside a part of the body bearing the reproductive faculty, while others grow from spontaneous generation without seeds.

Since plants nourish themselves they have the faculty of nutrition. And because it is of the nature of plants to grow, it follows that they have the faculty of growth. Again, since it is the nature of certain plants to reproduce their like and to he reproduced by their like, they have a reproductive faculty.

The reproductive faculty is different from the faculty of nutrition, for unripe fruits possess the nutritive but not the reproductive faculty; just as they possess1 the faculty of growth, but not that of reproduction. Similarly, the faculty of nutrition differs from that of growth. Do you not see that decrepit animals have the nutritive faculty but lack that of growth?

The nutritive faculty transmits food and replaces what has been dissolved with it; the faculty of growth increases the substance of the main structural organs in length, breadth, and depth, not haphazard but in such a way that they can reach the utmost perfection of growth. The reproductive faculty gives the matter the form of the thing; it separates from the parent body a part in which a faculty derived from its origin inheres and which, when the matter and the place which are prepared to receive its activity are present, performs its functions.

It will be evident from the foregoing that all vegetable, animal, and human functions are due to faculties over and above bodily functions, and even over and above the nature of the mixture itself.

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