The relationship between brain and mind is one of the most puzzling
questions in the whole field of scientific and philosophic thought. For
every thought we think, there is a corresponding brain-change; that we
know. The problem is: What is the nature of this connection, and how
can a thought (an immaterial thing, apparently) be connected in any
actual sense with a brain change (which is certainly a material thing?)
I have discussed this point at considerable length in my little book
on “Life,” in the present series, and have therein stated the various
theories so far propounded. The interested reader may refer to such
books as McDougall’s “Body and Mind,” Binet’s “The Mind and the Brain,”
Bain’s “Mind and Body,” Calderwood’s “The Relation of Mind and Brain,”
and C. A. Strong’s “Why the Mind has a Body,” for further and detailed
discussion upon this subject.