A gentleman demands himself by the law of heaven and earth, so he feels at ease. Small people are enslaved by foreign things, seeking fame and profit, and often worry about calculation.

From the Analects of Confucius, it is a famous saying since ancient times.

Many people often write this as a banner and hang it in their rooms to motivate themselves.

Confucius thought that an upright man is open and poised took his time. The villain is haggle over every ounce, be swayed by considerations of gain and loss.