The reasoning part, it should be understood, naturally bears rule over that which is void of reason. For the faculties of the soul are divided into that which has reason, and that which is without reason. Again, of that which is without reason there are two divisions: that which does not listen to reason, that is to say, is disobedient to reason, and that which listens and obeys reason. That which does not listen or obey reason is the vital or pulsating faculty, and the spermatic or generative faculty, and the vegetative or nutritive faculty: to this belong also the faculties of growth and bodily formation. For these are not under the dominion of reason but under that of nature. That which listens to and obeys reason, on the other hand is divided into anger and desire. And the unreasoning part of the soul is called in common the pathetic and the appetitive παθητικὸν καὶ ὀρεκτικόν.. Further, it is to be understood, that impulsive movement ἡ καθ᾽ ὁρμὴν κίνησις. likewise belongs to the part that is obedient to reason.