[136] for there arises then a most violent contention between two things which are natural adversaries, the lightest and the heaviest of things, each of them pressing onwards to reach its own place, and each striving against the violent efforts of the other; accordingly the fire, which is drawing up the earth with it, is compelled to sink down by its descending power; and the earth naturally inclining to the lowest point is nevertheless to a certain degree made light, and lifted up by the upward tendencies of fire, and so is raised on high, and being at last overpowered by the more influential power which lightens it is thrust upwards towards the natural seat of fire, and established on high.