Mipam ('ju mi pham rgya mtsho, 1846-1912) is one of the most prolific thinkers in the history of Tibet and is a key figure in the Nyingma tradition of Buddhism. His works continue to be widely studied in the Tibetan cultural region and beyond. This book provides an in-depth account of Mipam's view, drawing on a wide range of his works and offering several new translations. Douglas S. Duckworth shows how a dialectic of presence and absence permeates Mipam's writings on the Middle Way and Buddha-nature. Arguably the most important doctrine in Buddhism, Buddha-nature is, for Mipam, equivalent to the true meaning of emptiness; it is the ground of all and the common ground shared by sentient beings and Buddhas. This ground is the foundation of the path and inseparable from the goal of Buddhahood. Duckworth probes deeply into Mipam's writings on Buddha-nature to illuminate its central place in a dynamic Buddhist philosophy