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

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

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

All things come into being by conflict of opposites.

Nothing is, everything is becoming.

It is hard to contend against one's heart's desire; for whatever it wishes to have it buys at the cost of soul.

Everything flows and nothing abides. Everything gives way and nothing stays fixed.