Yoga Sutras of Patanjali
Building upon Himalayan Kumoan tradition of centuries old yoga development, Baba Hari Dass started his weekly Yoga Sutras of Patanjali classes at the University of California, at Santa Cruz, CA in 1975. Several commentaries and yoga classics were referenced, such as: "Yoga Vashishta", "Hatha Yoga Pradipika", "Shiva Samhita", "Goraksha Samhita","Yoga Bhashya" attributed to Veda Vyasa (probably the fifth C.E.); Īśvarakrishna's "Samkhyakarika "(4th or 5th century CE); Vācaspati Miśra's "Tattvavaiśāradī "(the ninth century C.E.); "Yogavartika" of Vijnanabhiksu (the sixteenth century C.E.)";" Swami Hariharananda Aranya's (1869–1947) "Yoga Philosophy of Patanjali", and Pandit Usharbudh Arya's commentary (1986). In his exposition of the yoga principles, continued until 2012, the Yoga Sutras of Patanjali and Ashtanga Yoga played a fundamental and formative role in educating yoga seekers.