A small little bulb fills the void with sufficient light to dispel the manifestations of a lack of light and its symptom, the fear. Health is the entity, something to be attained. Or perhaps more technically, life is the entity. Life and health are in a sense synonymous terms. We have been able to measure the absolute aspect of life.
Science can determine with a fairly good degree of certainty if a person is alive or dead.
What we are alluding to is that life is the entity. A full complement of life is total physical, spiritual, mental and emotional health. It can be lost, to a degree or totally. When it is lost totally, we describe that person as dead because they manifest certain signs and symptoms. Years ago, the lack of a heart beat or the absence of breathing were the manifestations of a lack of life.