_processes_ of
developing your two selves severally to work together as a team. Then
you must learn the particular _methods_ of cooeperative mental and
physical training that are most effective in accomplishing the man
growth you desire.

[Sidenote: Neither Mind Nor Body A Unit]

Not only have you two selves, but neither "You" is a _single unit_. Your
mind, as well as your body, is made up of distinctly different but very
intimately related and associated _parts_. Your "mind" cannot be
developed as a _whole_. Its parts must be severally bettered and
strengthened in coordination, just as the physical man is developed by
training his various muscles.

You know you have _distinct sets of muscles_ which all together make up
your _composite body_. Perhaps, however, you have not realized before
that your _mind_ is not a _unit_, but is made up of innumerable distinct
"mind centers," each of which functions as independently of the others
as your set of eye muscles operates independently of the set of muscles
governing the movements of one of your fingers. And possibly you do not
know that each _mind_ center has a distinct _brain_ center, which
functions for that _particular part alone_ of your whole mind. _Each
associated mind-and-brain center_ also has direct, distinct nerve
connections _with only one set of muscles_.

In fact, you are "a many-minded, many-bodied" man--a collection of
mental and physical _parts_, a composite man rather than a man unit.
These several parts are in large measure practically _independent_ of
one another. One set of body parts "belongs to" only its particular
associated set of mind parts, or mind center.

[Sidenote: Independent Mind and Body Centers]

If you were constituted otherwise, your life would be very precarious;
for the injury or destruction of even a minor part of your body would be
fatal to the whole unit. As it is, you can lose a finger without
affecting your eye-sight in the least. So you might suffer a localized
brain injury that would comp