 Kilwardby subscribes to the principle according to which two actual things cannot make one thing in actuality. But this principle, he claims, does not apply to the body and soul because neither the intellective soul nor the sensitive body—that is, the body informed by the sensitive form—are one complete being. The sensitive body is not perfect and needs to be completed by the intellective form, and the intellective form is created to be the perfection of the sensitive body (E 5, 41).