Being healthy is a combination of factors which over time, shape and mold the life of a human being. The definition of health is not only the absence of disease, but also a positive health status - a well-being, the ability to be active and productive in ones life. Being health is feeling that there are few physical or emotional impediments to doing things in your life that you would like. It's not so much a biological state as it is a state of mind. There are many people who are suffering from chronic illnesses who are healthy because they are able to maintain their creativity and vivacity when others cannot. Being healthy is first with the mind, having a sense of balance in life, also eating well, being able to exercise and being fully active. Having a job that is productive and filling is part of that balance.
The World Health Organization describes health as a state of social, physical and economic well-being. If you are missing any of these components, you will probably suffer in several ways. People who are the highest risk of poor health are those lacking financial, educational resources because they may not make good judgments or have access to health care when it is essential or when it's crucial in the prevention of an illness. For many people in the world, their demands for health care include those who face hunger and disease constantly - survival is health. The definition of health is very broad in terms of the health of a human being.
Health really starts with looking at our genetic map. DNA is like a blue print that determines, not only our physical bodies; it also partly determines our brains, which control our behavior. Our genes play a role in the way we think, feel and do things. There are two copies of the genes - one from each parent. Each time they are transmitted from parent to offspring, the genes have to be copied. The system isn't perfect so little mistakes or changes happen, most are irrelevant, so over time in any population we have variance on any given gene.