a true gentleman is well-rounded
A Confucian proverb meaning that a person of virtue should not be limited to a single skill or function, but should have broad knowledge and adaptability.
The saying 'a true gentleman is well-rounded' teaches that a leader should not be limited to just one specialty.
From the Analects of Confucius (論語). The phrase literally means 'the gentleman is not a vessel', implying that a noble person should not be confined to a single function.