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 with the earth. This is primal union.
He who has achieved this state is unconcened with friends and enemies,
With good and harm, with honor and disgrace.
This therefore is the highest state of man.
– Lao Tzu