There is also a philosophy of physiology and psychology. Three principles of health preservation, namely: physical health preservation, psychological health preservation and philosophical health preservation.

1, good health means eating and living, exercising moderately and getting something for nothing.

2, mental health, mainly to adjust their emotions, secular desires, don't be overjoyed, don't have unrealistic desires, don't let go of lost things.

3. The essence of philosophical health preservation is to let nature take its course. Knowing this is the law of nature, knowing the way of life and death, you will not be afraid of death.