This is the authoritative text book of Yoga, one of the six systems of Indian philosophy. Sanskrit Text and translation with commentary which provides a full picture of what Yoga is, what its aims are, how it can be practised, and what liberation of the soul means.
Be not afraid, for all great power throughout the history of humanity has been with the people. From out of their ranks have come all the greatest geniuses of the world, and history can only repeat itself. Be not afraid of anything. You will do marvelous work.
-Swami Vivekananda