Satchidananda Saraswati, born C. K. Ramaswamy Gounder and usually known as Swami Satchidananda, was an Indian yoga guru and religious teacher, who gained fame and following in the West. He was the author of philosophical and spiritual books and had a core of founding disciples who compiled his translations and updated commentaries on traditional handbooks of yoga such as the Yoga Sutras of Patanjali and the Bhagavad Gita for modern readers. Wikipedia