The so-called sincerity means not deceiving yourself. Hate the bad, like the bad smell, like the hobby, like the beautiful color, which teaches people inner self-sufficiency. Therefore, a gentleman should be cautious even when he is alone. Villains usually do bad things and don't do evil; See a gentleman, hide; But others seem to see his liver and lungs. What good is this cover-up? This teaches you inner truth and outer expression. Therefore, even when a gentleman is alone, he should be careful not to be casual.

Ceng Zi said: Ten eyes looking at you and ten fingers pointing at you, this is really terrible! Rich people can decorate their houses beautifully; A virtuous person can enrich himself, be open-minded and naturally comfortable in body and mind. Therefore, a gentleman must be honest in his inner thoughts.