It is the Life, or the Life Force within, acting under the direction and guidance of the subconscious or subjective mind that is the agency through which this continually new cell-formation process is going on. The subconscious mind is, nevertheless, always subject to suggestions and impressions that are conveyed to it by the conscious or sense mind; and here lies the great fact, the one all-important fact for us so far as desirable or undesirable, so far as healthy or unhealthy, so far as normal or aging body-building is concerned. That we have it in our power to determine our physical and bodily conditions to a far greater extent than we do is an undeniable fact. That we have it in our power to determine and to dictate the conditions of "old age" to a marvellous degree is also an undeniable fact--if we are sufficiently keen and sufficiently awake to begin early enough. If any arbitrary divisions of the various periods of life were allowable, I should make the enumeration as follows: Youth, barring the period of babyhood, to forty-five; middle age, forty-five to sixty; approaching age, sixty to seventy-five; old age, seventy-five to ninety-five and a hundred. That great army of people who "age" long before their time, that likewise great army of both men and women who along about middle age, say from forty-five to sixty, break and, as we say, all of a sudden go to pieces, and many die, just at the period when they should be in the prime of life, in the full vigour of manhood and womanhood and of greatest value to themselves, to their families, and to the world, is something that is _contrary to nature_, and is one of the pitiable conditions of our time. A greater knowledge, a little foresight, a little care in _time_ could prevent this in the great majority of cases, in ninety cases out of every hundred, without question. Abounding health and strength--wholeness--is the natural law of the body. The Life Force of the body, acting always under the direction of the subconscious mind, _will build, and always does build_, healthily and normally, unless too much interfered with. It is this that determines the type of the cell structure that is continually being built into the body from the available portions of the food that we take to give nourishment to the body. It is affected for good or for bad, helped or hindered, in its operation by the type of conscious thought that is directed toward it, and that it is always influenced by. Of great suggestive value is the following by an able writer and practitioner: