पातञ्जल योगसूत्र (स्वामी विवेकानन्द भाष्य एवं सूत्र व्याख्या)

Patanjali Yoga Sutras
then dies, and so on, and in this way much time will be lost in
dying and in being born again. If the body could be made
strong and perfect, so that it would get rid of birth and death,
we should have so much more time to become spiritual. So
these Rasayanas say, first make the body very strong, and
they claim that this body can be made immortal. The idea is
that if the mind is manufacturing the body, and if it be true
that each mind is only one particular outlet to that infinite
energy, and that there is no limit to each particular outlet
getting any amount of power from outside, why is it
impossible that we should keep our bodies all the time? We
shall have to manufacture all the bodies that we shall ever
have. As soon as this body dies we shall have to manufacture
another. If we can do that why cannot we do it just here and
no, without getting out? The theory is perfectly correct. If it is
possible that we live after death, and make other bodies, why
is it impossible that we should have the power of making
bodies here, without entirely dissolving this body, simply
changing it continually? They also thought that in mercury
and in sulphur was hidden the most wonderful power, and that
by certain preparations of these a man could keep the body as
long as he liked. Others believed that certain drugs could
bring powers, such as flying through the air, etc. Many of
the most wonderful medicines of the present day we owe to
the Rasayamas, notably the use of metals in medicine.
Certain sects of Yogis claim that many of their principal
teachers are still living in their old bodies. Patanjali, the great
authority on Yoga, does not deny this.
The power of words. There are certain sacred words called
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