WHY THE SOUL IS NOT A HARMONY.
As has already been said above[74] this hypothesis is inadmissible for several reasons. To begin with, the soul is prior (to the body), and the harmony is posterior thereto. Then the soul dominates the body, governs it, and often even resists it, which would be impossible if the soul were only a harmony. The soul, indeed, is a "being," which harmony is not. When the corporeal principles of which we are composed are mingled in just proportions, their temperament constitutes health (but not a "being," such as the soul). Besides, every part of the body being mingled in a different manner should form (a different harmony, and consequently) a different soul, so that there would be several of them. The decisive argument, however, is that this soul (that constitutes a harmony) presupposes another soul which would produce this harmony, as a lyre needs a musician who would produce harmonic vibrations in the strings, because he possesses within himself the reason according to which he produces the harmony. The strings of the lyre do not vibrate of themselves, and the elements of our body cannot harmonize themselves. Nevertheless, under this hypothesis, animated and orderly "being" would have been made up out of inanimate and disordered entities; and these orderly "beings" would owe their order and existence to chance. That is as impossible for parts as for the whole. The soul, therefore, is no harmony.
THE SOUL IS NOT THE ENTELECHY OF THE BODY (POLEMIC AGAINST ARISTOTLE). ARISTOTLE'S STATEMENT OF THE PROBLEM.[75]
(13). b. Now let us examine the opinion of those who call the soul an entelechy. They say that, in the composite, the soul plays the part of form in respect to matter, in the body the soul animates. The soul, however, is not said to be the form of any body, nor of the body as such; but of the natural body, that is organized, and which possesses life potentially.[76]