Supposing we tried to constr
uct a
mind-model as a result of psychological investigations, a model
which, as we should say,
9.
would explain the action of
the mind. This model would be part of a psychological
theory in the way in which a mechanical model of the ether can be
part of a theory of electricity. (Such a model, by
the way, is always part of the
symbolism of a
theory. Its advantage may be that it is seen at a
glance and easily held in the mind. It has been said
that a model, in a sense, dresses up the pure theory; that the
naked theory is sentences or equations.
This must be examined more closely later on.)