Change is the only constant.
People ought to fight to keep their law as to defend the city s walls.
No man ever steps in the same river twice, for it's not the same river and he's not the same man.
Everything flows and nothing abides; everything gives way and nothing stays fixed... Cool things become warm, the warm grows cool; the moist dries, the parched becomes moist... It is in changing that things find repose.
You won't discover the limits of the soul, however far you go.
The river where you set your foot just now is gone-those waters give way to this, now this.