(4) He must know the length, number, form, condition, and purpose of each member of the body, its particular flesh, marrow, and all other details. (5) He must know where all emunctoria lie and how they are to be averted; also what is in every cavity of the body, and everything about the intestines. (6) He must with all his might and being seek to understand about life and death, what the chief organs in man mean, and what each member can and may suffer. If we look to Paracelsus as the real founder of Homœopathy, so also must we regard him as the pioneer of magnetism and magnetic healing. Man, he maintained, is nourished through the magnetic power which resides in all Nature and by which each individual being draws its specific nourishment to itself. He called this magnetic force _Mumia_ in his special phraseology, and he laid great stress on the healing power which resided in this _Mumia_. “Just as the power of the lily breaks forth in perfume which is invisible, so,” he writes, “the invisible body sends forth its healing influence. Just as in the visible body are wonderful activities which the senses can perceive, so, too, lie powers in the invisible body which can work great wonders.” To him the whole universe was one, and knit together by indissoluble bonds. “The astral currents created by the imagination of the Macrocosmos,” he writes, “act upon the Microcosmos, and produce certain states in the latter, and likewise the astral currents produced by the imagination and will of man produce certain states in external Nature; and these currents may reach far, because the power of the imagination reaches as far as thought can go. The physiological processes taking place in the body of living beings are caused by their astral currents, and the physiological and meteorological processes taking place in the great organism of Nature are caused by the astral currents of Nature as a whole. The astral currents of either act upon the other, either consciously or unconsciously; and if this fact is properly understood it will cease to appear incredible that the mind of man may produce changes in the universal mind, which may cause changes in the atmosphere—winds and rains, storm, hail and lightning—or that evil may be changed into good by the power of Faith. Heaven is a field into which the imagination of man throws the seeds.” Here, in a single paragraph, is the philosophy of Astrology, and the justification for the efficacy of prayer.