We suggest you turn to the Tao Teh Ching:
33 He who knows others is learned; but he who knows himself is wise, nay, in the end it could be illumined. He who conquers others has strength of muscles; To conquer oneself is hard. So he who conquers himself is strong. To be content with what one has is to feel rich; so let the contented feel rich. Next: He who works, may eventually succeed. And he one who acts with vigour has will. Even he who works through sordid violence can get his way - The determined one has strength of will. What stays in its place can endure. He who doesn't lose his centre can last quite long, he who hardly loses his place (with such as dao). The one ho dies but doesn't really perish enjoys long life. He who dies yet (his power) remains has long life. When such a one dies he should hardly be thought of as [too] lost; there's no other longevity [than long life]. -- tr. T. Byrn