4. If now, in the course of our discussion, it has been ascertained that these things are so, it seems to follow that we next consider the nature of corporeal being, seeing the diversity in the world cannot exist without bodies. It is evident from the nature of things themselves, that bodily nature admits of diversity and variety of change, so that it is capable of undergoing all possible transformations, as _e.g._ the conversion of wood into fire, of fire into smoke, of smoke into air, of oil into fire. Does not food itself, whether of man or of animals, exhibit the same ground of change? For whatever we take as food, is converted into the substance of our body. But how water is changed into earth or into air, and air again into fire, or fire into air, or air into water, although not difficult to explain, yet on the present occasion it is enough merely to mention them, as our object is to discuss the nature of bodily matter. By matter, therefore, we understand that which is placed under bodies, viz. that by which, through the bestowing and implanting of qualities, bodies exist; and we mention four qualities—heat, cold, dryness, humidity. These four qualities being implanted in the ὕλη, or matter (for matter is found to exist in its own nature without those qualities before mentioned), produce the different kinds of bodies. Although this matter is, as we have said above, according to its own proper nature without qualities, it is never found to exist without a quality. And I cannot understand how so many distinguished men have been of opinion that this matter, which is so great, and possesses such properties as to enable it to be sufficient for all the bodies in the world which God willed to exist, and to be the attendant and slave of the Creator for whatever forms and species He wished in all things, receiving into itself whatever qualities He desired to bestow upon it, was uncreated, _i.e._ not formed by God Himself, who is the creator of all things, but that its nature and power were the result of chance. And I am astonished that they should find fault with those who deny either God’s creative power or His providential administration of the world, and accuse them of impiety for thinking that so great a work as the world could exist without an architect or overseer; while they themselves incur a similar charge of impiety in saying that matter is uncreated, and co-eternal with the uncreated God. According to this view, then, if we suppose for the sake of argument that matter did not exist, as these maintain, saying that God could not create anything when nothing existed, without doubt He would have been idle, not having matter on which to operate, which matter they say was furnished Him not by His own arrangement, but by accident; and they think that this, which was discovered by chance, was able to suffice Him for an undertaking of so vast an extent, and for the manifestation of the power of His might, and by admitting the plan of