Considering the precarious condition of human existence, vulnerable, dependent on, and susceptible to, a many and variable influences, the desire for and appreciation of an undisturbed and steady state of good health seems to be quite natural and an anthropological constant. In fact, throughout the ages people have strived to secure, protect, and restore – or even to enhance and prolong – the precious moments of well being that they may have experienced from time to time amidst their ordinary troubled lives. Accordingly, medicine was invented and developed to prevent, relieve, and cure diseases, to reduce or eliminate, as far as possible, any impairment or injury to health. In modern times, the demands of patients and claims of doctors towards the optimum state of health, have increased considerably. People are no longer content with being or becoming relatively healthy after medical treatment, but instead want to become healthier or attain the healthiest state possible. After all, who would refrain from having a bigger house, a faster car, or a higher salary – if he could choose? Yet, contrary to measurable things that can be compared quantitatively, for health there is no uniform scale for assessing what is to be considered good, better, or best health. On the contrary, everything depends on the conceptual framework which underlies this notion. That is why people do not necessarily mean the same thing when they talk about health.