ist of five different forms, _viz._,
sight, hearing, smell, touch, and taste.

The Yogis teach that there are higher senses, undeveloped, or
comparatively so, in the majority of the race, but toward the unfoldment
of which the race is tending. But we shall not touch upon these latent
senses in this lesson, as they belong to another phase of the subject. In
addition to the five senses above enumerated, some physiologists and
psychologists have held that there were several others in evidence. For
instance, the sense by which the inner organs revealed their presence and
condition, The muscular system reports to the mind through some sense
that is not that of "touch," although closely allied to it. And the
feelings of hunger, thirst, etc., seem to come to us through an unnamed
sense.

Bernstein has distinguished between the five senses and the one just
referred to as follows: "The characteristic distinction between these
common sensations and the sensations of the senses is that by the latter
we gain knowledge of the occurrences and objects which belong to the
external world (and which sensations we refer to external objects),
whilst by the former we only feel conditions of our own body."

A sensation is the internal, mental conception, resulting from an
external object or fact exciting the sense organs and nerves, and the
brain, thus making the mind "aware" of the external object or fact. As
Bain has said, it is the "mental impression, feeling, or conscious state,
resulting from the action of external things on some part of the body,
called on that account, sensitive."

Each channel of sense impressions has an organ, or organs, peculiarly
adapted for the excitation of its substance by the particular kind of
vibrations through which it receives impressions. The eye is most
cunningly and carefully designed to receive the light-waves; and
sound-waves produce no effect upon it. And, likewise, the delicate
mechanism of the ear responds only to sound-waves; light-waves failing to
register upon it. Each set of sensations is entirely different, and the
organs and nerves designed to register each particular set are peculiarly
adapted to their own special work. The organs of sense, including their
special nervous systems, may be compared to a delicate instrument that
the mind has fashioned for itself, that it may investigate, examine and
obtain reports from the outside world.

We have become so accustomed to the workings of the