eason guides the man and instinct guides the nautilus.
These are but two names for light; the one is dawn, the other noon, but
both are light. I cannot see in what respect the light of a lamp differs
from that of a bonfire except in volume; they are the products of the
same forces in Nature, acting through the same media, and, becoming
causes, produce the same effects. That psychic spark which dimly glows
in the animal bursts into a blaze of effulgence in man. The one differs
from the other just as a single ray of sunlight differs from the glaring
light of noon. [Sidenote: EFFECTS OF ONE GREAT CAUSE] If man could
disabuse his mind of that contempt for things below his plane of life,
and hush the siren voice of self-conceit, his better senses might be
touched by the eloquence of truth. But while the vassals of his empty
pride control his mind, the plainest facts appeal to him in vain, and
all the cogency of proof is lost. He is unwilling to forego that vain
belief that he is Nature's idol, and that he is a duplicate of Deity.
Held in check by the strong reins of theology and tradition, he has not
dared to controvert those dogmas which bear the stamp of error on their
face; he dares not turn away from the idols of his own conceit and read
the rubrics written in the fossil rocks; he dares not take those proofs
which none can counterfeit, and whose authority is not gainsaid; he
dares not lay aside the yoke which galls the neck of patience, or
breathe the air unblest by some mysterious rite performed in fear. By
such restraints his ears are closed against those voices which appeal to
him from without the temple gates of his belief. In what respect would
man be less god-like if it be shown that monkeys talk? To elevate the
humbler ranks could not degrade mankind. Whether man is the work of
Deity or was evolved by laws of change from primal matter; whether he
was made in one specific act or is the last amendment to a million prior
types; whether he is the creature of design or accident, the authorship
of his being and that of all the forms which roam the broad empire of
life must be the same. We are all the effects of one Great Cause,
whatever that may be, and that which gave to man the power of speech
imparted it to apes; and I can see no reason why Nature should have
drawn a line about this faculty, and made the rest a common heritage.

CHAPTER XXI.

Certain Marks which Characterise the Sounds of Monkeys as
Sp