2. People have three kinds of diseases: physical diseases; Mental illness; Negative energy disease (called "karma disease" in Buddhism). Although the first two diseases are caused by four major causes from the perspective of Buddhism, secular people (including those who have just started practicing) cannot be cured by faith alone, because ordinary people are not strong in mind and will and must rely on doctors for treatment. But if it is the third disease, negative energy disease (the doctor can't find it, but you know you must be sick and uncomfortable; Or found out, but medicine is powerless), it depends on the power of faith to cure.