Yoga Sutra 4.1 Sources of optimal efficiency

Birth, herbs, mantra, purification techniques and deep integrationi (samadhi)   https://simple-yoga.org This is an excerpt from the book Unravel the Thread available at:  Amazon https://www.amazon.com/dp/1737648202/ and Barnes & Noble  https://www.barnesandnoble.com/w/unravel-the-thread-rub-n-v-squez/1139928755