Thus from the one primitive divine element the Kosmos, with all its hierarchy of being, is evolved. But in the Stoic system πάντα ῥεῖ,[3] there is no continuance in any one condition. As in the normal life of all earthly creatures there comes a certain climax or turning point, after which the forces of decay gain slowly but surely on those of growth and resistance, so also runs the history of the universe which includes them all. One by one the steps by which it was formed shall be retraced, and the derived substances which compose it consumed and re-absorbed by that from which they sprang. From matter in its grossest form to its purest, from earth and stone and water to the highest intelligence in men and dæmons and Gods, nothing shall escape this doom of dissolution; everything shall yield up its separate existence, until at last the indestructible element of that primeval fire is again the sole being that remains, and Zeus is “alone in the conflagration,” self-contemplating in the solitudes of thought. But this is not the end. There is no end. The plastic impulse again resumes its sway, and soon another cycle of world-development and world-destruction begins to run its course. In the language of Seneca, “When that fatal day, that necessity of the times, shall have arrived, and it seems good to God to make an end of old things and ordain the better, then shall the ancient order be revoked and every creature be generated anew, and a race ignorant of guilt be given to the earth.” This was the general physical system on which all Stoics were agreed, although there were differences of opinion upon minor points; such as how far these successive cycles resembled each other? some asserting that they did so in the minutest detail, others only in their larger features. It was a system, for all its superstitions, not without grandeur and truth. At bottom it expressed a sense of that phenomenon of ebb and flow, systole and diastole, the action and counteraction of balanced forces, which is perhaps the profoundest law of life.