快乐是人生的一种需要,是心灵的维生素,幸福的催化剂,长寿的灵芝草。养生家、医学家都提倡快乐养生,快乐有利于心身健康,快乐有利于预防疾病,快乐有利于延年益寿。快乐能使人心身和谐。乐与喜一样,同为心志,若快乐适度,则心脏活动正常。心脏活动正常,不仅生理功能保持正常的协调关系,心身活动也会处于和谐的状态,有益身心健康。快乐能使人忘掉忧愁。快乐是长寿的法宝,忧愁是健康的大敌。孔子说:“乐以忘忧,不知老之将至。”《内经》云:“悲哀愁忧则心 Happiness is a need in life, it is a spiritual vitamins, a catalyst of happiness, and a long-lived ganoderma grass. Health advocates, medical scientists advocate happy health, happiness is conducive to physical and mental health, happiness is conducive to the prevention of disease, happiness is conducive to longevity. Happiness can make people heart and body harmony. Like music and joy, with the same mind, if happy moderate, the heart activity is normal. Normal heart activity, not only to maintain normal physiological function of coordination, physical and mental activity will be in a harmonious state, good for body and mind. Happiness can make people forget sadness. Happiness is the magic of longevity, sadness is the enemy of health. Confucius said: ”Happy to worry about, I do not know the approaching of the old.“ ”“ Classic ”cloud: " sad sorrow is the heart