on" is a classic Buddhist meditation instruction manual deeply rooted in the Indian Buddhist "calming-and-insight" meditation tradition. Within its tradition, it is the universally-acknowledged standard beginning-to-intermediate meditation manual, one which offers perhaps the most reliable, comprehensive, and practically-useful Buddhist meditation instruction currently available in English. The author of "The Essentials" is the sixth-century monk and meditation master, Shramana Zhiyi (Chih-i), one of the most illustrious figures in the history of Chinese Buddhism. Master Zhiyi is famous for his role in the founding of the Tiantai teachings lineage and for his authorship of a quartet of meditation manuals of which this is one. The translator of this volume is the American monk, Bhikshu Dharmamitra, a translator of numerous classic works from the Indian and Chinese Buddhist traditions.