This is the lifeforce in its material aspect. Sometimes called nervous or electro-nervous energy and at other times known as bio-energy. In the East is known as prana; in China it is conceived as being duel in nature and is known as yin and yang. Ethros is the power behind telepathy, hypnotism, psychokinesis, dowsing, psychic manifestation and so-called sixth sense. (See Lifeforce.)