The "seven feelings" of a person are joy, anger, sorrow, thought, sadness, fear, and surprise. Among these, the most common are sorrow, thought, and sadness. During such times, a person's mood is bad, and their spirit is low. Psychologists have investigated and found that some couples' unhappiness stems either from experiencing setbacks in work, or encountering difficulties in interpersonal relationships, or due to conflicts between the spouses.