There is nothing permanent except change. Nothing is permanent except change. The only constant is change. Change is the only constant. Change alone is unchanging.
The nature of things is in the habit of concealing itself.
Nature is accustomed to hide itself.
Man is on earth as in an egg.
There is harmony in the tension of opposites, as in the case of the bow and lyre.
The Cosmos was not made by gods but always was and is eternal fire.