The so-called "health depends on nourishing the heart" means that the highest state of health is to achieve a state of peace, simplicity, indifference and detachment, that is, the state of nourishing the heart. According to the systematic analysis of the World Health Organization on human health and longevity, it is confirmed that 60% of everyone's health and longevity depends on themselves; 15% depends on genetic factors; 10% depends on social factors; 8% depends on medical conditions; 7% depends on the influence and function of environment and climate. Among the most important personal factors affecting human health and longevity, personal mental health, lifestyle and behavior habits have become important influencing factors. Medical research also shows that besides diet and daily life, people's emotions are closely related to health. The function of psychological balance is enough to exceed the sum of all health care measures. When people encounter mental stress and are in a bad psychological state such as tension, anger and anxiety, it will cause some abnormal changes in physiology. If it happens repeatedly for a long time, it may gradually evolve from physiological and functional changes to organic injuries. It can be seen that many psychological diseases caused by psychological imbalance are one of the main incentives for the final formation of physiological patients. As a natural person, its health standard should be: "Only physical health, mental health, good social adaptation and moral health are completely healthy". In other words, a person should be not only physically healthy, but also mentally healthy, which is the real health. Therefore, in this sense, mental health is the premise and important guarantee of human health and longevity. Many physiological diseases can be avoided or delayed if people's psychology can always maintain a peaceful and good state. Man's psychological balance is a psychological state in which some needs of man are met, a manifestation of solving psychological contradictions in cognition and emotion, and an objective reflection of man's adaptation to the environment. So how to judge whether people's psychology is healthy? At first glance, whether the integrity of personality can be coordinated with social development. Personality reflects a person's overall mental outlook. Generally, people with mental health feel good about themselves as a whole, and their temperament, personality, ideals and beliefs are all positive; You can adopt an appropriate and flexible attitude in dealing with people; The way to deal with the problem is reasonable and safe; Will not have adverse reactions to external stimuli, and the behavior is biased. Second, see if you can effectively control your emotions and maintain a good mental state. As a mentally healthy person, he always has more feelings of pleasure and satisfaction than negative emotions such as sadness, worry and anger, and can properly express and control his emotions to maintain his emotions and normal mental state, and his mood is always cheerful and optimistic. Third, see if psychological behavior can meet the age characteristics. A mentally healthy person should have the same psychological and behavioral characteristics as most of his peers. Mentally healthy people are always good at and willing to get along with others, and often have friendly exchanges and good communication with each other. They can not only understand and understand others, but also be understood and understood by others. I have a strong adaptability to the social environment and a full sense of security, and I can gain the trust of others. Fifth, whether we can correctly face the objective reality. People with mental health can objectively evaluate the surrounding environment and actual situation and treat them correctly; Can actively adapt to the external reality and keep good contact with it; Have full self-confidence, be able to calmly deal with all kinds of difficulties and emergencies in real life and handle them properly. Sixth, see if you can fully understand yourself and evaluate yourself correctly. Mentally healthy people have self-knowledge, good self-control, clear life goals, hard work, contentment and always maintain psychological balance. ?