Essentially, man, as a soul is a causal-bodied being. His causal body is an idea-matrix for the astral and physical bodies. The causal body is composed of 35 idea elements corresponding to the 19 elements of the astral body plus the 16 basic material elements of the physical body.
This body is, from the standpoint of the physical plane, no body, either subjective or objective. It is, nevertheless, the center of the egoic consciousness, and is formed of the conjunction of buddhi and manas. It is relatively permanent and lasts throughout the long cycle of incarnations, and is only dissipated after the fourth initiation, when the need for further rebirth on the part of a human being no longer exists.