The unity of knowing and doing comes from Wang Yangming's "Biography", Volume 5: Yes, but it is still not refined. However, as my son said, knowing and doing go hand in hand, and there is no doubt about it.

its vernacular translation is: this statement is also inaccurate. However, even as you said, the idea of the unity of knowledge and practice is definitely unquestionable.

Extended materials:

The Handbook contains Wang Yangming's main philosophical thoughts and is an important material for studying Wang Yangming's thoughts and the development of psychology. The first volume was reviewed by Wang Yangming himself, and the letters in the middle volume were written by Wang Yangming himself in his later years.

Wang Shouren's theory of unity of knowledge and action is not only aimed at Zhu Xi, but also different from Lu Jiuyuan. Zhu Ludu advocates knowing first, then knowing later. Wang Shouren opposed dividing knowledge and action into two parts, and advocated seeking truth from my heart. He said: "knowing is the idea of doing, and doing is the kung fu of knowing;" Knowing is the beginning of doing, and doing is the achievement of knowing. Just say one thing, and it has its own line; Just say one line, and you already know it. "

"knowing and doing" is an important category of China's traditional philosophy, which started from Shangshu and Zuozhuan. Shangshu said that "it is difficult to do what you don't know" and Zuozhuan said that "it is difficult to do what you don't know, but you will do it".

Reference: Baidu Encyclopedia-"Practice Book"