Mircea Eliade, Yoga: Immortality and Freedom, 2nd. Ed. (Bollingen Series LVI), translated from the French by Willard R. Trask, and with a new introduction by David Gordon White ( Princeton & Oxford: Princeton U. Press, 1958, 2009) ("We can distinguish at least two orientations, different yet convergent, in this emphatic valuation of the human body and its possibilities: (1) there is the importance accorded to the total experience of life as constituting an integral part of sadhana, and this is the general position of the tantric school; (2) there is, in addition, the will to master the body in order to transmute it into a divine body, and this is especially the position of Hatha Yoga. Such a mastery must begin modestly, on the basis of an accurate knowledge of the organs and their functions. For 'How can the Yogis who do not know their body (as) a house of one column (with) nine doors, and (as presided over by) five tutelary divinities, attain perfection (in Yoga)?' But perfection is always the goal, and, as we shall soon see, it is neither athletic nor hygienic perfection. Hatha Yoga cannot and must not be confused with gymnastics. Its appearance is linked with the name of an ascetic, Gorakhnath, founder of the order, Kanphata Yogis. He is supposed to have lived in the twelfth century, perhaps even earlier. All that we know about Gorakhnath is distorted by a sectarian mythology and a profuse magical folklore, but facts that may be considered reliable warrant the supposition that he was in close relation with the 'Diamond Vehicle.' . . . Id. at 228.).
Chogyal Namkhai Norbu, Yantra Yoga: The Tibetan Yoga of Movement: A Stainless Mirror of Jewels: A Commentary on Vairocana's The Union of the Sun and the Moon, translated from Tibetan, edited and annotated by Adriano Clemente with the precious help of the Author; translated from Italian into English by Andrew Lukianowicz, coordinated by Laura Evangelisti (New York: Snow Lion Publication, 2008) (From the backcover: "Yantra Yoga, the Buddhist parallel to Hathayoga of the Hindu tradition, is a system of practice entailing bodily movements, breathing exercises and visualizations. Originally transmitted by the mahasiddhas of India and Oddiyana, its practice is nowadays found in all schools of Tibetan Buddhism in relation to the Anuttaratantras, more generally known under the Tibetan term trulkbor, whose Sanskrit equivalent is yantra." "The Union of the Sun and the Moon ('Phrul 'khor nyi zla kha sbyor), orally transmitted in Tibet in the eighth century by the great master Padmasambhava to the Tibetan translator and Dzogchen master Vairochana, can be considered the most ancient of all the systems of Yantra and its peculiarity is that it contains also numerous positions which are also found in the classic Yoga tradition." "Chogyal Namkhai Norbu, one of the great living masters of Dzogchen and Tantra, started transmitting this profound Yoga in the seventies, and at that time wrote this commentary which is based on the oral explanations of some Tibetan yogins and siddhas of the twentieth century. All Western practitioners will benefit from the extraordinary instructions contained in this volume.".
Swami Sivananda Radha, Hatha Yoga: The Hidden Language: Symbols, Secrets and Metaphors (20th Anniversary Edition), with an Foreword by Swami Lalitananda, and a Preface by B. K. S. Iyengar (Kootenay, BC, & Spokane, WA: Timeless Books, 1987, 2006).
