No same man could walk through the same river twice, as the man and the river have since changed.

Change is the only constant.

Unless you expect the unexpected you will never find it, for it is hard to discover and hard to attain.

If we do not expect the unexpected, we will never find it.

And some men are as ignorant of what they do when awake as they are forgetful of what they do when asleep.

Nothing is constant except change

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.