If you want to know where something is going, it is good to know where it came from. “To be ignorant of what happened before one was born,” said Cicero pointedly in his Orator, “is to remain ever a child.” History provides context and meaning, and Yoga is no exception to this rule. If you are fond of history, you’ll enjoy what follows. Many of the facts and ideas presented here have not yet found their way into the textbooks or even into most Yoga books. We put you in touch with the leading edge of knowledge in this area. If you are not a history buff, well, perhaps we can tempt you to suspend your preferences for a few minutes and read on anyway.