The Bircher definition states that health is "a dynamic state of well-being characterized by physical and mental potential, meeting the needs of a life commensurate with age, culture and personal responsibility." Likewise with Seneca the Younger's statement, both definitions identify that one's health is measured by more than the presence of disease. Although Seneca the Younger does not outright state that there are other health factors that must be taken into consideration, this is what he means to imply when he states that it is "...very different from simply not being ill"; as this suggests there are multiple components in one