Unity of knowing and doing is not unity of knowing and doing. Knowledge is conscience, and conscience is the heart of right and wrong. Think about where to start. It is not a question of traditional epistemology (knowing and doing), but a question of discussing moral cultivation. Mr. Yang Ming also said: "If there is something wrong with the engine, this bad idea must be knocked down, and it must be completely eradicated, so that it will not lurk in my chest. This is my purpose. " It is the core of Confucian discussion on knowing and doing, and always emphasizes moral significance and the idea that knowing and doing are inseparable. As long as we always act according to the guidance of conscience, we can naturally distinguish between right and wrong in the world and find ways to apply what we have learned. Don't complain and don't be rude. Go to school and climb to the top, (good) know me!