s absolutely essential as a means of discriminating the cardinal
classes of life from one another and of conceiving each class to be what
it is instead of mixing it confusedly with something radically different.
It will greatly help the reader if he will retire to the quiet of his
cloister and there meditate about as follows. A line has one dimension; a
plane has two; a plane contains lines and so it has line
properties--_one_-dimensional properties--but it has other
properties--_two_-dimensional properties--and it is these that are peculiar
to it, give it its own character, and make it what it is--a plane and not a
line. So animals have some plant properties--they grow, for example--but
animals have other properties--autonomous mobility, for example,--properties
of higher dimensionality or type--and it is these that make animals
_animals_ and not plants. Just so, human beings have certain animal
properties--autonomous mobility, for example, or physical appetites--but
humans have other properties or propensities--ethical sense, for example,
logical sense, inventiveness, progressiveness--properties or propensities
of higher dimensionality, level, or type--and it is these propensities and
powers that make human beings _human_ and _not_ animal. When and only when
this fact is clearly seen and keenly realized, there will begin the
_science of man_--the science and art of _human nature_--for then and only
then we shall begin to escape from the age-long untold immeasurable evils
that come from regarding and treating human beings as animals, as mere
binders of space, and we may look forward to an ethics, a jurisprudence
and economics, a governance--a science and art of human life and
society--based upon the laws of human nature because based upon the just
conception of humanity as the time-binding class of life, creators and
improvers of good, destined to endless advancement, in accord with the
potencies of Human Nature.(9)

Humanity is still in its childhood; we have "bound" so little time in the
course of the centuries, which are so brief in the scheme of the universe.
At the bottom of every human activity, historical fact or trend of
civilization, there lies some doctrine or conception of so-called "truth."
Apples had fallen from trees for ages, but without any important results
in the economy of humanity. The fact that a fallen apple hit Newton, led
to the discovery of the theory of gravitation; this changed our whole
world