We suggest you turn to the Tao Teh Ching:
33 Those who know others are intelligent; those who know themselves are truly wise. Those who master others are strong; those who master themselves have true power. Those who know they have enough are truly wealthy. Those who persist will reach their goal. Those who keep their course have a strong will. Those who embrace death will not perish, but have life everlasting. -- tr. J. McDonald