the total Universe (_as
if it_ were a mind or a mirror of the mind), for Feeling or Affection we
shall put Impression or Nature; for Knowing or Reflection we shall put
Science or Systematized Knowledge; and for Conation or Action we shall
put Art.

The following table will exhibit the two series of distribution, that of
the Universe at large, and that of the Human Mind, in their parallelism,
reading the two columns from below upward:

I. _Universe_. II. _Mind_.

3. ART (_or Expression_). 3. CONATION (or Will and Desire).
2. SCIENCE. 2. KNOWING.
1. NATURE (_or Impression_). 1. FEELING (_or Affection_).

The point of present importance in the use of these discriminations is
to make clear to the mind of the reader what perhaps is sufficiently
implied in the very terms themselves, namely: that _Impression_ and
_Expression_ are correlative to, and, in a sense, exactly reflect each
other; that the totality of _Impression_, or the Universe which enters
the mind through the senses, is repeated--with a modification, it is
true, but still with traceable identity, or with a definite and unbroken
relationship--in the totality of _Expression_, or in the Universe of
Art, taken as the entirety of what man does or creates. It is by the
mediation of Science or Knowledge, that one of these worlds is converted
into the other. Nature or _Impression_ is the aggregate of the Rays of
Incidence falling upon a mirror; Science is the Reflecting Mirror; and
Art or Human Performance is the aggregate of the Reflected Rays, whose
angles can be exactly calculated by the knowledge of the angle of
incidence. Science or Knowledge is not only the mirror which makes the
Reflection, but it is the plane or level which is to furnish us the
means of adjusting the angles; of knowing their correspondence or
relation to each other; and of translating the one into the other.
Science must, therefore, as it develops, be the instrument of informing
us of the exact analogy between Nature and Art; and must enable us so to
apply the Laws of Nature, or the Laws of God as exhibited in Nature,
that they shall become a perfect canon of life and action, in all our
attempted performances and constructions, whatsoever they may be; or,
_vice versa_, it must enable us from the knowledge of the laws of our
own actions to reveal the secrets of Nature, and to know, by the
analogy, in what manne