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.
Whatever you believe, that you will be. If you believe yourselves to be sages, sages you will be tomorrow. There is nothing to obstruct you.
-Swami Vivekananda