He does not reflect upon past pleasures; but, seeing the gun
in his master's hand, a confused idea of the feelings that were
associated with the gun in times past is called up. So the ox and the
horse learn to associate certain movements with the voice and gesture
of man. And so a fish, about the most stupid of all animals, comes to a
certain spot at a certain signal to be fed. These combinations are
quite elementary. This is quite another thing from that reciprocal
action of ideas on each other by which man perceives the relations of
things, understands the laws of cause and effect, and not only forms
judgments of the past, but draws conclusions which are laws for the
future. We find in the brute no power of attending to and arranging its
thoughts,--no power of calling up the past at will and reflecting upon
it. The animal has the faculty of memory, and, when this is awakened,
the object remembered may be accompanied by a train or attendance of
accessory notions which have been connected with the object in the
animal's past experience. But it never seems to be able to exercise the
purely voluntary act of recollection. It is not capable of comparing
one thing with another, so far as we can judge. If the animal could
exercise any true act of comparison, there would be no limit to the
exercise of it, and the animal would be an intelligent being; for the
result of a simple act of comparison is judgment, and reasoning is only
a double act of comparison.
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