Apparently holiness, magical virtue, taboo, or whtever we may call that mysterious quality which is supposed to pervade sacred or tabooed persons, is conceived by the primitive philosopher as a physical substance or fluid, with which the sacred man is charged just as a Leyden jar is charged with electricity; and exactly as the electricity in the jar can be discharged by contact with a good conductor, so the holiness or magical virtue in the man can be discharged and drained away by contact with the earth, which on this theory serves as an excellent conductor for the magical fluid. Hence in order to preserve the charge from running to waste, the sacred or tabooed personage must be carefully prevented from touching the ground; in electrical language he must be insulated, if he is not to be emptied of the precious substance or fluid with which he, as a vial, is filled to the brim. And in many cases apparently the insulation of the tabooed person is recommended as a precaution not merely for his own sake but for the sake of others; for since the virtue of holiness or taboo is, so to say, a powerful explosive which the smallest touch may detonate, it is necessary in the interest of the general safety to keep it within narrow bounds, lest breaking out it should blast, blight, and destroy whatever in comes into ccontact with.

Frazer: 1922, p 688-689.