Health, for both Dr. J.T. Kent and Dr. H.C. Allen, is not just “no disease”; it is a state of dynamic balance in which the inner, immaterial life principle governs the body harmoniously and allows the human being to fulfil moral, intellectual and social purposes. Disease, in turn, is a disturbance of this dynamic “simple substance” or vital force, which begins deep within and only later appears as functional or structural pathology.