This Kalachakra text develops the highly complex theory of correlation between the internal elements with a living human body and the elements of the external world, and gives a detailed account of Tibetan astrology.

Gavin Kilty has been a full-time translator for the Institute of Tibetan Classics since 2001. Before that he lived in Dharamsala, India, for fourteen years, where he spent eight years training in the traditional Geluk monastic curriculum through the medium of class and debate at the Institute of Buddhist Dialectics. He has also received commissions to translate for other institutions, such as the Foundation for the Preservation of Mahayana Teachings, Tibet House Germany, The Gelug International Foundation, and Tsadra Foundation.

Thupten Jinpa Langri was educated in the classical Tibetan monastic academia and received the highest academic degree of Geshe Lharam (equivalent to a doctorate in divinity). Jinpa also holds a BA in philosophy and a PhD in religious studies, both from the University of Cambridge, England. Since 1985, he has been the principal English-language translator to the Dalai Lama. He has translated and edited many books by the Dalai Lama, including The World of Tibetan Buddhism, Essence of the Heart Sutra, and Ethics for the New Millennium. Jinpa has published scholarly articles on various aspects of Tibetan culture, Buddhism, and philosophy, and books such as Songs of Spiritual Experience (co-authored) and Self, Reality and Reason in Tibetan Thought. He serves on the advisory board of numerous educational and cultural organizations in North America, Europe, and India. He is currently the president and the editor-in-chief of the Institute of Tibetan Classics, a nonprofit educational organization dedicated to translating key Tibetan classics into contemporary languages. He also currently chairs the Mind and Life Institute.