Tao Te Ching · Chapter 33

知人者智，自知者明。
勝人者有力，自勝者強。
知足者富。
強行者有志。
不失其所者久。
死而不亡者壽。

He who knows other men is discerning; he who knows himself is intelligent. He who overcomes others is strong; he who overcomes himself is mighty. He who is satisfied with his lot is rich; he who goes on acting with energy has a (firm) will.

He who does not fail in the requirements of his position, continues long; he who dies and yet does not perish, has longevity.