pineal gland, fourth ventricle, and
_calamus scriptorius_.

Man is essentially a triple organization, consisting of the permanent
psychic being, intangible to our external senses, but nevertheless so
distinctly recognized internally by consciousness and externally or in
others, by intuition and understanding, that the psychic is as well
understood and known as the physical being. This being is the eternal
man--the material body being its temporary associate.

The physical being, or material form, consists of the portion directly
and entirely occupied by the psychic existence--which is called the
brain or encephalon, and is in life also beyond the reach of our
senses in the interior of the cranium--and the non-psychic structure,
the body, which, though not the residence of the soul, has so intimate
and complete a connection with the entire brain that during active
life it feels as if it were the actual residence of the soul, so far
as sensation and action are concerned.

The soul, or psychic being, has external and internal perceptions (for
which it has cerebral organs). When the former predominate too
greatly, the human body and all external objects are realized most
vividly, and the reality of psychic life is not so well realized or
understood. Hence persons so organized are disposed to materialism,
and either doubt the existence of their psychic being, or are
indifferent to it.

On the other hand, those in whom the interior faculties predominate
too greatly vividly realize their psychic life, but have more vague
and feeble conceptions of material objects, including their own
bodies, and attach undue importance to the imaginary and subjective in
preference to the objective. The materialists and the illusionists,
however, are not entirely composed of these two classes of subjective
and objective thinkers. The majority consists of persons of moderate
reasoning capacity, who simply follow their leaders.

In making a critical distinction between the psycho-organic brain and
non-psychic body, the former may be confined strictly within the
cranium, leaving the exterior portions of the head as a part of the
non-psychic body; but as they are more intimately associated with the
brain than any part below the neck, this distinction is not important;
and if the whole head, as the environment of the psychic brain, be
grouped with it, it may not lead to any material error. The brain is
intimately associated with the ent