Psychology simply cannot be defined; indeed, it
cannot even be easily characterized. Even if one were to do so today, tomorrow
would render the effort inadequate. Psychology is what scientists and
philosophers of various persuasions have created to try to fulfill the need to
understand the minds and behaviors of various organisms from the most primitive
to the most complex. As a distinct discipline it finds its roots a mere century
or so back in the faculties of medicine and philosophy. From medicine it took
the orientation that explication of that which is done, thought, and felt
ultimately must be couched in biology and physiology; from philosophy it took a
class of
deep problems concerning mind, will, and knowledge.