scientific one that demands to know what the mental forces are and how
they can be used most effectively.

[Sidenote: What We Want to Know]

There is no especial need here to trace the historical development of
these two problems or enter upon a discussion of religious or
philosophical questions.

Our immediate interest in the mind and its relationship to the body is
not because we want to be assured of the salvation of our souls after
death.

_We want to know all we can about the reality and certainty and
character of mental control of bodily functions because of the practical
use we can make of such knowledge in this life, here and now._

[Sidenote: Spiritualist, Materialist and Scientist]

The practical scientist has nothing in common with either spiritualists,
soul-believers, on the one hand, or materialists on the other. So far as
the mortality of the soul is concerned, he may be either a spiritualist
or a materialist But spiritualism or materialism is to him only an
intellectual pastime. It is not his trade. In his actual work he seeks
only practical results, and so confines himself wholly to the actual
facts of human experience.

The practical scientist knows that as between two given facts, and
_only_ as between these two, one may be the "cause" of the other. But he
is not interested in the "creative origin" of material things. He does