It is a regulated movement, a swinging from one side to the other
over a definite distance, a length of wave, a vibration.

The question is often put: "How can things in such different
categories, as matter and Spirit, affect each other? Can we
bridge that great gulf which some say can never be crossed?" Yes,
the Indian has crossed it, or rather, has shown that there is no
gulf. To the Indian, matter and Spirit are not only the two
phases of the One, but, by a subtle analysis of the relation
between consciousness and matter, he sees that in every universe
the LOGOS imposes upon matter a certain definite relation of
rhythms, every vibration of matter corresponding to a change in
consciousness. There is no change in consciousness, however
subtle, that has not appropriated to it a vibration in matter;
there is no vibration in matter, however swift or delicate, which
has not correlated to it a certain change in consciousness. That
is the first great work of the LOGOS, which the Hindu scriptures
trace out in the building of the atom, the Tanmatra, " the
measure of That," the measure of consciousness. He who is
consciousness imposes on his material the answer to every change
in consciousness, and that is an infinite number of vibrations.
So that between the Self and his sheaths there is this invariable
relation: the change in consciousness and the vibration of
matter, and vice versa. That makes it possible for the Self to
know the Not-Self.

These correspondences are utilised in Raja Yoga and Hatha Yoga,
the Kingly Yoga and the Yoga of Resolve. The Raja Yoga seeks to
control the changes in consciousness, and by this control to rule
the material vehicles. The Hatha Yoga seeks to control the