Tao Te Ching by LAO TSU Translation by Gia Fu Feng and Jane English

Fifty-Six

Those who know do not talk.
Those who talk do not know.

Keep your mouth closed,
Guard your senses.
Temper your sharpness.
Simplify your problems.
Mask your brightness.
Be at one with the dust of the earth.
This is the primal union.

He who has achieved this state
Is unconcerned with friends and enemies,
With good and harm, with honor and disgrace.
This therefore is the highest state of man.