Thanissara Mary Weinberg was a Buddhist nun for twelve years and has taught meditation retreats with her partner, Kittisaro, since 1992. Together they founded Dharmagiri Sacred Mountain Retreat in South Africa and co-authored Listening to the Heart: A Contemplative Guide to Engaged Buddhism. She is also author of Time to Stand Up: An Engaged Buddhist Manifesto for Our Earth. Thanissara and Kittisaro launched Sacred Mountain Sangha, a California-based nonprofit.