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The etheric plane (see also Etheric body) is a term introduced into Theosophy by Charles Webster Leadbeater and Annie Besant to represent the subtle part of the lower plane of existence. It represents the fourth () subplane of the physical plane (a hyperplane), the lower three being the states of solid, liquid, and gaseous matter. The idea was later used by authors such as Alice Bailey, Rudolf Steiner, Walter John Kilner and others. The term aether (also written as "ether") was adopted from ancient Greek philosophy and science into Victorian physics (see Luminiferous aether) and utilised by Madame Blavatsky to correspond to akasha, the fifth element (quintessence) of Hindu metaphysics. The Greek word ''aither'' derives from an Indo-European root ''aith''- ("burn, shine"). Blavatsky also related the idea to the Hindu ''Prana'' principle,〔Blavatsky, H.P., ''The Key to Theosophy'', 1889〕 the vital, life-sustaining force of living beings, present in all natural processes of the universe. Prana was first expounded in the Upanishads, where it is part of the worldly, physical realm, sustaining the body and the mind. Blavatsky also tended to use the word "astral" indiscrimininately for these supposed subtle physical phenomena. Leadbeater and Besant〔Besant, Annie. ''Man's life in this and other worlds'', Theosophical Publishing House, Adyar, 1913〕 (Adyar School of Theosophy) conceived that the etheric plane constituted four higher subplanes of the physical plane. According to the Theosophist Geoffrey A. Farthing,〔Farthing, Geoffrey A., ''(The Etheric Double:The Far-Reaching Effects of a false Assumption )'', from a booklet in private circulation dated June 1995, reprinted from ''Theosophy World''〕 Leadbeater used the term, because of its resonance in the physical sciences, to describe his clairvoyant investigations of sub-atomic physics. In physics, there is no aether through which electromagnetic waves propagate (see also aether theories).〔Tulloch, David & Ford, Katrina, ''(Historic Dispute: Is space filled with a medium known as the aether? )'', Technology Industry, Vol. 3, 2004〕〔Roberts, Tom, ''(What is the experimental basis of Special Relativity? )'', October 2007〕 ==Christian Rosicrucians== Similarly according to Max Heindel Rosicrucian writings;〔Heindel, Max, ''The Rosicrucian Mysteries (Chapter III: (The Visible and the Invisible Worlds ))'', 1911, ISBN 0-911274-86-3〕 there is - in addition to the solids, liquids, and gases which compose the ''Chemical Region'' of the Physical World - a finer grade of matter called ether that permeates the atomic structure of the earth and its atmosphere. It is disposed in four grades of density and is considered to be a kind of physical matter (the blue haze seen in mountain canyons is said to be in fact ether of the kind known to occult investigators as ''chemical ether''). Associated there is also a type of spiritual sight, that man will eventually develop, called ''etheric vision''.〔A Student, ''(Etheric Vision and What It Reveals )'', ISBN 0-911274-59-6, 110 pages〕 Ether is reported to be of four kinds, or grades of density in our planet Earth; their names (from the lowest or most dense to the highest or most subtle one) and their relation to the human being, from the point of view of these Esoteric Christian teachings, is as following:〔Heindel, Max, ''The Rosicrucian Cosmo-Conception (Chapter I.2, (The Etheric Region of the Physical World ))'', 1909, ISBN 0-911274-34-0〕 * the "Chemical Ether": both positive and negative in manifestation and it is related to the assimilation and excretion processes; * the "Life Ether": has also a positive and negative pole and it is related to the forces of propagation; * the "Light Ether": the positive pole is related to forces which generate blood heat in the higher species of animal and in the human being and the negative is related to the forces which operate through the senses (passive functions of sight, hearing, feeling, tasting, and smelling); * the "Reflective Ether": the medium through which thought makes an impression upon the human brain and this ether contains pictures which work as reflexions of the Memory of Nature found at the World of Thought. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Etheric plane」の詳細全文を読む スポンサード リンク
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