All is flux, nothing is stationary.
And some men are as ignorant of what they do when awake as they are forgetful of what they do when asleep.
All things come into being by conflict of opposites.
There is exchange of all things for fire and of fire for all things, as there is of wares for gold and of gold for wares.
It is in changing that things find purpose.
Knowing many things doesn't teach insight.