Mayavi Rupa — sanskrit, "Illusive Form." It is the body of manifestation created by the adept by an act of will for use in the three worlds. It has no material connection with the physical body. It is spiritual and ethereal and passes everywhere without let or hindrance. It is built by the power of the lower mind, of the highest type of astral matter.
(Alice A. Bailey "Initiation, Human and Solar")