SOUL IS A SIMPLE SUBSTANCE, WHILE EVERY BODY IS COMPOSED OF MATTER AND FORM.
(c.) (Every body is a composite of matter and form, while the soul is a simple substance.) Inasmuch as matter possesses no quality,[44] the matter of no simple body will be said to possess life in itself. That which imparts life to it must then be its form. If form is a "being," the soul cannot simultaneously be matter and form; it will be only matter or form. Consequently, the soul will not be the body, since the body is not constituted by matter exclusively, as could be proved analytically, if necessary.