But if some say that the body is immaterial, in the same way as the fifth body The reference is to the Pythagorean and Aristotelian ideas of the heavens as being like the body of Deity, something uncorrupt, different from the four elements, and therefore called a fifth body, or element (στοιχεῖον). In his Meteor. i. 3, De Cœlo i. 3, &c., Aristotle speaks of the Ether as extending from the heaven of the fixed stars down to the moon, as of a nature specially adapted for circular motion, as the first element in rank, but as the fifth, “if we enumerate beginning with the elements directly known by the senses.…the subsequently so-called πέμπτον στοιχεῖον, quinta essentia.” The other elements, he taught, had the upward motion, or the downward: the earth having the attribute of heaviness, and its natural place in the world being the lowest; fire being the light element, and “its place the sphere next adjoining the sphere of the ether.” See Ueberweg’s History of Philosophy, Vol. I. p. 167, Morris’s translation, and the chapter on the De Cœlo in Grote’s Aristotle, Vol. II. pp. 389, &c. of which the Greek philosophers speak (which body is an impossibility), it will be wholly subject to motion like the heaven. For that is what they mean by the fifth body. Who then is it that moves it? For everything that is moved is moved by another thing. And who again is it that moves that? and so on to infinity till we at length arrive at something motionless. For the first mover is motionless, and that is the Deity. And must not that which is moved be circumscribed in space? The Deity, then, alone is motionless, moving the universe by immobility Greg. Naz. ut supr.. So then it must be assumed that the Deity is incorporeal.