as, spirit, matter; man, woman; odd, even; subjective,
objective; in, out; upper, under; motion, rest; yea, nay.

Whilst the world is thus dual, so is every one of its parts.
The entire system of things gets represented in every particle.
There is somewhat that resembles the ebb and flow of the sea,
day and night, man and woman, in a single needle of the pine,
in a kernel of corn, in each individual of every animal tribe.
The reaction, so grand in the elements, is repeated within
these small boundaries. For example, in the animal kingdom
the physiologist has observed that no creatures are favorites,
but a certain compensation balances every gift and every defect.
A surplusage given to one part is paid out of a reduction from
another part of the same creature. If the head and neck are
enlarged, the trunk and extremities are cut short.

The theory of the mechanic forces is another example. What
we gain in power is lost in time, and the converse. The
periodic or compensating errors of the planets is another
instance. The influences of climate and soil in political
history are another. The cold climate invigorates. The
barren soil does not breed fevers, crocodiles, tigers or
scorpions.

The same dualism underlies the nature and condition of man.
Every excess causes a defect; every defect an excess. Every
sweet hath its sour; every evil its good. Every faculty
which is a receiver of pleasure has an equal penalty put on
its abuse. It is to answer for its moderation with its life.
For every grain of wit there is a grain of folly. For every