f man, which are intellectual realities. Moreover, these
existing sciences, arts, laws and endless inventions of man at one time
were invisible, mysterious and hidden secrets; it is only the
all-encompassing human power which has discovered and brought them out
from the plane of the invisible to the plane of the visible. So
telegraphy, photography, phonography and all such inventions and wonderful
arts were at one time hidden mysteries. The human reality discovered and
brought them out from the plane of the invisible to the plane of the
visible. There was even a time when the qualities of this iron which you
see--indeed of all the minerals--were hidden mysteries; men discovered this
mineral, and wrought it in this industrial form. It is the same with all
the other discoveries and inventions of man, which are innumerable.

This we cannot deny. If we say that these are effects of powers which
animals also have, and of the powers of the bodily senses, we see clearly
and evidently that the animals are, in regard to these powers, superior to
man. For example, the sight of animals is much more keen than the sight of
man; so also is their power of smell and taste. Briefly, in the powers
which animals and men have in common, the animal is often the more
powerful. For example, let us take the power of memory. If you carry a
pigeon from here to a distant country, and there set it free, it will
return, for it remembers the way. Take a dog from here to the center of
Asia, set him free, and he will come back here and never once lose the
road. So it is with the other powers such as hearing, sight, smell, taste
and touch.

Thus it is clear that if there were not in man a power different from any
of those of the animals, the latter would be superior to man in inventions
and the comprehension of realities. Therefore, it is evident that man has
a gift which the animal does not possess. Now, the animal perceives
sensible things but does not perceive intellectual realities. For example,
that which is within the range of its vision the animal sees, but that
which is beyond the range of sight it is not possible for it to perceive,
and it cannot imagine it. So it is not possible for the animal to
understand that the earth has the form of a globe. But man from known
things proves unknown things and discovers unknown truths. For example,
man sees the curve of the horizon, and from this he infers the roundness
of the earth. The Pole Star at Akka