On the Incorruptibility of the World (31-35)

And this law and ordinance is established with reference to [*] [*]

But since the world has no participation in that irregularity which exists in the things which I have just been mentioning, let us stop awhile and consider this point. If the world were liable to corruption and destruction, it follows of necessity that all its parts would at present be arranged in a position not in accordance with nature: but it is impious even to imagine such a thing as this; for all the parts of the world have received the most excellent position possible, and an arrangement of the purest symmetry and harmony; so that each individual part, being content with its place as a native country to it, does not seek any change for the better.

On this account it is that the most central position of all has been assigned to the earth, to which all things belonging to it adhere, and to which they descend again even if you throw them into the air: and this is a proof that their place is in accordance with nature; for wherever anything is borne without any violence, and where it then remains firm and stationary, that is clearly its natural place. And then, in the second place, water was poured over the earth, and air and fire have gone from the central to the upper part, air having received for its portion the region which is on the borders between air and fire, and fire having received the highest place of all: on which account, if you light a torch and press it down towards the ground, nevertheless the flame will still turn in a contrary direction, and lightening itself in accordance with the natural motion of fire, will rise upwards:

if, then, motion contrary to nature is the cause of corruptibility and destruction in the case of other animals, but if in the case of the world every one of its parts is arranged in complete accordance with nature, having had appropriate positions allotted to each of them, then surely the world must most justly be pronounced incorruptible and imperishable.

Moreover this point is manifest to every one, that every