People who plant trees need to prune their roots, while people in Xiu De need to prune their hearts. To plant trees, you must cultivate roots, and those who cultivate morality must cultivate their own hearts first. As the saying goes, water the flowers and roots and make friends. It is the same truth: to cultivate a big tree, we must start from the roots. To educate a person, we must start with morality. To plant trees, we must cultivate roots, and those who cultivate morality must first cultivate their own mind. This is what Wang Shouren, a great thinker of Ming Dynasty, said in his biography. The common understanding of "nourishing the heart" is to strengthen moral cultivation. But in fact, Wang Yangming's cultivation of mind is to keep his mind, be determined to be single-minded and not distracted, just like planting trees and cutting off messy branches. The original text is as follows: Those who plant trees must cultivate their roots first. A person who cultivates morality must have a heart. If you want to plant a tree, you must delete its branches at the beginning. If you want to be virtuous, you must go abroad when you start school. If poetry is good outside, the spirit will gradually leak into poetry. Everything is fine outside. He also said, "My learning theory is a work made out of nothing. A gentleman needs to be trustworthy. Just made up my mind. A scholar's ambition is good, just like planting a tree, but don't forget to help, just cultivate the future. Nature grows day and night. Angry hair, lush foliage. When a tree is born, it will branch. It must also be published. Then the roots can grow. The same is true for beginners. Therefore, I am determined to be single-minded. "