The causal body is the vehicle of the immortal principle of a human being, the Ego, which survives the death and disintegration of the lower bodies-physical, astral, and mental. It acts as a receptacle for the essence of a human being's experiences and lessons in various incarnations. In the causal body also lies the creative power of meditation.

This classic work by Col. Arthur E. Powell is part of a series of books seeking to provide a condensed synthesis of the considerable literature given by well-known Theosophical writers. Other books in the series are The Etheric Double, The Astral Body, The Mental Body, and the Solar System.

Arthur Edward Powell (1882-1969), was a Theosophist whose books were published beginning in the early 1900s. He studied the major esoteric works of Helena Blavatsky, Charles Webster Leadbeater and Annie Besant.