So we scientists and doctors simply and soberly affirm the principle of strength of faith and the nationalist socialist principle of Positive Christianity which does not prevent us from the inspired consideration of natural and divinely willed phenomena. We doctors must never forget the fact that the soul rules the body. Soul forces are the most important. The spirit builds the body. Strength springs from joy. Efficiency is achieved despite care, fear, and uncertainty--We speak here of thymogenetic automatism or the automatism of harmony ("thymogenetische automatismus oder stimmungsautomatismus"). The autonomous nervous system achieves, under the influence of joy, the expansion of the blood vessels in skin and muscle.... The muscular activity incited by joy means the use of calories and stimulation of appetite. Muscular contraction pulls and draws at the bones, ligaments are tensed, breathing deepend, appetite increased ... A child influenced by the daily exercise of joy develops physically strong and powerful. ... The Soul care (Seele Sorge) of the practical doctor is his most significant daily task alongside of prescriptions and manipulative dexterity. Soul-care in the medical sense is a concern for the wishes, hopes and fears of the patient, the considered participation in his fate. Such a relationship leads to the all-important and generally recognized trust in the doctor. This faith, in all cases, leads to the improvement, often even to the elimination of symptoms, of the disease. Here we have clearly before us the great significance of thymogenetic automatism. Academic physicians should not dismiss this because we do not know its biochemical aspects. (We must beware of regarding something as unacceptable because it is not measurable in exact terms, he warns.) We see its practical results, and, therefore, thymogenetic automatism must stand in the first rank as of overwhelming significance. Thus, also, the principle, strength through joy (Kraft durch Freude) stands firmly as an inescapable natural law. We see the practical country doctor spreading courage and confidence. For years too few doctors have seen clearly that gymnastic tourism and sport do more for health than all doctors taken together. And now we face the fact that a single man, a non-medical man (Hitler) through his great qualities, has opened up new avenues of health for the eighty million folk of Germany.