He who knows himself has insight.
He who conquers men has force;
He who conquers himself is truly strong.
He who knows when he has got enough is rich,
And he who adheres assiduously to the path of Tao is a man of steady purpose.
He who stays where he has found his true home endures long,
And he who ‘dies’ but perishes not enjoys real longevity.
—Tao Te Ching, 33