This is speaking from analogy, but you will come to see that it is actually true. Each and everything that appears before the eyes is but the representative of its cause, and there is no cause except in the interior. Cause does not flow from the outermost of man to the interior, because man is protected against such a state of affairs. Causes exist in such subtle form that they cannot be seen by the eye. There is no disease that t exists of which the cause is known to man by the eye or by the microscope.
Causes are infinitely too fine to be observed by any instrument of precision.
They are so immaterial that they correspond to and operate upon the interior nature of man, and they are ultimated in the body in the form of tissue changes that are recognized by the eye. Such tissue changes must be under stood as the results of disease only or the physician will never perceive what disease cause is, what disease is, what potentization is, or what the nature of life is. This is what Hahnemann meant when he speaks of the fundamental causes as existing in chronic miasm. Just as soon as man lives a disorderly life he is susceptible to outside influences, and the more disorderly he lives the more susceptible he becomes to the atmosphere he lives in. When man thinks in a disorderly way he carries out his life in a disorderly way, and makes himself sick by disorderly habits of thinking and living.