"Kundalini, the serpent power or mystic fire; it is called the serpentine or annular power on account of its spiral-like working or progress in the body of the ascetic developing the power in himself. It is an electric fiery occult, or fohatic power, the great pristine force which underlies all organic and inorganic matter."- H. P. Blavatsky."Kundalini is the static form of the creative energy in bodies which are the source of all energies including Prana...
"This word comes from the adjective Kundalina, or "coiled." She is spoken of as "coiled" because she is sleeping, lies coiled; and because the nature of her power is spiraline...
"In other words, this Kundalini shakti is that which, when it moves to manifest itself, appears as the Universe. To say that it is "coiled" is to say that it is at rest - that is, in the form of static potential energy...
Taken from Treatise On Cosmic Fire by Alice Bailey