The Yoga Sutra is the great motherbook of all the yoga works ever written; it was composed by the Indian master Patanjali some 2,000 years ago. The Sanskrit text is written in 210 briefs, cryptic verses whose meaning has long ago sunk into darkness; the many, confusing modern attempts to explain them bear little resemblance to each other, which is just a sign of how difficult this priceless little book can be.