Health is a sense of well being. Health includes mental physical and environmental aspect. Health maintenance is an ongoing process includes a healthy life style, healthy environment, and physical exercises. Health is affected by psychological state. Psychological well being increase endurance to work and immunity to diseases, in contrary to psychological stress or psychological illness which decrease ability to work or think , also decrease immunity to illness which make human vulnerable to multiple disease. Social aspect of health is very important. Volunteering in social activities promote cognitive abilities and decreases psychological stress.