singly they might have passed by unnoticed. [Footnote: This idea
forms, of course, the fundamental reason for advertisement.] We
must not, however, apply this rule only to the simple examples of
the spiritual atmosphere. For this atmosphere is like air, which
can be either pure or filled with various alien elements. Not
only visible actions, thoughts and feelings, with outward
expression, make up this atmosphere, but secret happenings of
which no one knows, unspoken thoughts, hidden feelings are also
elements in it. Suicide, murder, violence, low and unworthy
thoughts, hate, hostility, egotism, envy, narrow "patriotism,"
partisanship, are elements in the spiritual atmosphere.

[Footnote: Epidemics of suicide or of violent warlike feeling,
etc., are products of this impure atmosphere.]

And conversely, self-sacrifice, mutual help, lofty thoughts,
love, un-selfishness, joy in the success of others, humanity,
justness, are the elements which slay those already enumerated as
the sun slays the microbes, and restore the atmosphere to purity.

[Footnote: These elements likewise have their historical
periods.]

The second and more complicated form of repetition is that in
which several different elements make mutual use of different
forms. In our case these elements are the different arts summed
up in the art of the future. And this form of repetition is even
more powerful, for the different natures of men respond to the
different elements in the combination. For one the musical form
is the most moving and impressive; for another the pictorial, for