18、人要学会藏两样东西，一是心事，二是本事

The passage emphasizes the importance of hiding one"s emotions (心事) and abilities (本事) to avoid burdening others or attracting jealousy. It suggests learning to be selective in sharing personal struggles and maintaining a balance in showcasing one"s skills to prevent conflicts. The main themes revolve around emotional intelligence， interpersonal dynamics， and self-preservation.