[105] Come, now, let us consider the matter thus: if everything is resolved into fire, there is then something light, and rare, and warm; for all these are the especial properties of fire; but there can be nothing heavy, or cold, or thick, which are the opposites of the qualities which I have just enumerated. How then can any one more completely overturn the idea of the universal disorder which would be involved in such a conflagration than by showing that those things which by a law of nature must exist together, are by this process separated from their natural conjunction? And the separation has extended to such a degree, that those who maintain this doctrine attribute eternal durability to the one and deny any existence at all to the other.