“Skeptics, and even skeptical spiritualists, have often unjustly accused mediums of fraud, when denied what they considered their inalienable right to test the spirits. But where there is one such case, there are fifty in which spiritualists have permitted themselves to be practiced upon by tricksters, while they neglected to appreciate genuine manifestations procured for them by their mediums.
Ignorant of the laws of mediumship, such do not know that when an honest medium is once taken possession of by spirits, whether disembodied or elemental, he is no longer his own master. He cannot control the actions of the spirits, nor even his own. They make him a puppet to dance at their pleasure while they pull the wires behind the scenes.
The false medium may seem entranced, and yet be playing tricks all the while; while the real medium may appear to be in full possession of his senses, when in fact he is far away, and his body is animated by his “Indian guide”, or “control”. Or, he may be entranced in his cabinet, while his astral body (double) or doppelganger, is walking about the room moved by another intelligence.
Among all the phenomena, that of repercussion, closely allied with those of bi-location and aerial “traveling”, is the most astounding. In the middle ages it was included under the head of sorcery.
De Gasparin, in his refutations of the miraculous character of the marvels of Cideville, treats of the subject at length; but these pretended explanations were all in their turn exploded by de Mirville and des Mousseaux, who, while failing in their attempt to trace the phenomena back to the Devil, did, nevertheless, prove their spiritual origin.”
H. P. Blavatsky