These lectures are intended to give an outline of Yoga, in order to
prepare the student to take up, for practical purposes, the Yoga sutras
of Patanjali, the chief treatise on Yoga. I have on hand, with my friend
Bhagavan Das as collaborator, a translation of these Sutras, with
Vyasa's commentary, and a further commentary and elucidation written in
the light of Theosophy. To prepare the student for the mastering of that
more difficult task, these lectures were designed; hence the many
references to Patanjali. They may, however, also serve to give to the
ordinary lay reader some idea of the Science of sciences, and perhaps to
allure a few towards its study.