e outside world by
means of waves that travel from body to body--from sun to earth, and from
lamp to eye. These waves of light arise from vibrations in substance, of
an almost incredible degree of rapidity. The lowest light vibration is
about 450,000,000,000,000 per second, while the highest is about
750,000,000,000,000 per second. These figures deal only with the
vibrations recognizable by the eye as light. Above and below these
figures of the scale are countless other degrees invisible to the eye,
although some of them may be recorded by instruments. The different
sensations of color, depend upon the rate of the vibrations, red being
the limit of the lowest, and violet the limit of the highest visible
vibrations--orange, yellow, green, blue, and indigo being the
intermediate rates or colors.

The cultivation of the sense of Sight, under the aid of Attention is most
important to ail persons. By being able to clearly see and distinguish
the parts of an object, a degree of knowledge regarding it is obtained
that one may not acquire without the said exercise of the faculty. We
have spoken of this under the subject of Attention, in a previous lesson,
to which lesson we again refer the student. The fixing of the eye upon an
object has the power of concentrating the thoughts and preventing them
from wandering. The eye has other properties and qualities that will be
dwelt upon in future lessons. It has other uses than seeing. The
influence of the eye is a marvelous thing, and may be cultivated and
developed.

We trust that what we have said will bring the student to a realization
of the importance of developing the powers of Perception. The senses have
been developed by the mind during a long period of evolution and effort
that surely would not have been given unless the object in view was worth
it all. The "I" insists upon obtaining knowledge of the Universe, and
much of this knowledge may be obtained only through the senses. The Yogi
student must be "wide awake" and possessed of developed senses and
powers of Perception. The senses of Sight and Hearing, the two latest in
the scale of Evolutionary growth and unfoldment, must receive a
particular degree of attention. The student must make himself "aware"
of what is going on about and around him, so that he may "catch" the best
vibrations.

It would surprise many Westerners if they could come in contact with a
highly developed Yogi, and witness the marvelously finely develo