back to the brain and arouses more ideas.

The device of stimulating ideas by expressive movements may be utilized
in theme- or letter-writing. It is generally recognized that the
difficult thing in such writing is to get a start, and the too common
practice is to sit listlessly gazing into space waiting for
"inspiration." This is usually a futile procedure. The better way is to
begin to write anything about the topic in hand. What you write may
have little merit, either of substance or form. Nevertheless, if you
persist in keeping up the activity of writing, making more and more
movements, you will find that the ideas will begin to come in greater
profusion until they come so fast you can hardly write them down.

Having tried to picture the neural effect of expression, we may now
translate them into psychological terms, asking what service the
expressions render to the conscious side of our study. First of all, we
note that the expressions help to make the acts and ideas in study
habitual. We find ourselves, with each expression, better able to
perform such acts as the pronunciation of foreign words. Second, they
furnish new impressions through the kinaesthetic sense, thus being a
source of sense-impression. Third, they give rise to a greater number
of ideas and link them up with the idea dominant at the moment. There
is a further psychological effect of expression in the clarification of
ideas. It is a well-attested fact that when we attempt to explain a
thing to someone else, it becomes clearer in our own minds. You can
demonstrate this for yourself by attempting to explain to someone an
intricate conception such as the nebular hypothesis. The effort
involved in making the explanation makes the fact more vivid to you.
The habit of thus utilizing your knowledge in conversation is an
excellent one to acquire. Indeed, expression is the only objective test