Those who hear and do not understand are like the deaf. Of them the proverb says: "Present, they are absent."

Corpses are more fit to be thrown out than is dung.

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 river where you set your foot just now is gone-those waters give way to this, now this.

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

Ever-newer waters flow on those who step into the same rivers.

The nature of things is in the habit of concealing itself.