Whosoever wishes to know about the world must learn about it in its particular details. Knowledge is not intelligence. In searching for the truth be ready for the unexpected. Change alone is unchanging. The same road goes both up and down. The beginning of a circle is also its end. Not I, but the world says it: all is one. And yet everything comes in season.

Eyes and ears are poor witnesses to people if they have uncultured souls.

Opposition brings concord. Out of discord comes the fairest harmony.

The path up and down is one and the same.

Nothing endures but change. There is nothing permanent except change. All is flux, nothing stays still.

History is a child building a sand-castle by the sea, and that child is the whole majesty of man's power in the world.

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.