1 180, Lu Jiuyuan was 43 years old. At the invitation of Zhu, he gave a lecture at Nankang Egret Academy. The theme of this speech is "Gentleman's righteousness, villain's benefit". This sentence comes from the Analects of Confucius and has been discussed by many people. It is a commonplace topic, but Lu Jiuyuan is innovative and innovative. He pointed out that the difference between "gentlemen" and "villains" lies not in their external behaviors, but in their "ambitions", and where their ambitions point, their behaviors will be manifested.