There are two main points, one is advocating nature, and the other is keeping in good health by eating. He said, "It is natural to be specially influenced by foreign gases ... As for rational guidance and breeding, you can get your life for thousands of years, you can have ears for hundreds of years, but you can't get it." He also said: "A gentleman knows that form depends on God, and God must exist in form. He realizes that reason is easy to lose and that reason is harmful to life. Therefore, practice nature to protect the gods, feel at ease all over, love and hate are not entangled in feelings, worry and joy are not in the heart, indifference and indifference, peace, breathing and breathing, eating for a living, so that the form and spirit are in harmony, and both internal and external cultivation. "