There is one other important point which must be noticed. It is this:
the _subjective_ outlook reacts upon the _objective_. The knowledge of
the world which we gain through our own previous experiences, and
through literature, increases our capacity for understanding the
objective world, and heightens and intensifies the pleasure which we
derive from the contemplation of works of art or of nature. It is this
principle which underlies the truth which Goethe states when he says
that a traveler does not take anything out of Rome which he has not
first brought into it.