Pir Vilayat Inayat Khan
• Spiritual leader for the Sufi Order in the West
• Active in the multifaith movement
• Prolific speaker and writer about the essence of Sufism
Madeleine L'Engle
• Writer of more than 60 books
• Winner of the John Newbery Medal for her children's book A Wrinkle in Time
• Christian laywoman, speaker, and workshop leader
Stephen Levine
• American writer, poet, and mediation teacher
• Pioneer teacher of Theravada Buddhism and Hinduism in the West
• Workshop leader on conscious aging/conscious dying
Thomas Merton
• Pathfinder for the Christian contemplative spirituality movement
• Pioneer of interspirituality and interfaith dialogue
• Social activist and cultural critic
Henri J. M. Nouwen
• Roman Catholic priest and spiritual guide
• Prolific writer on spirituality
• Pastor for the L'Arche communities serving people with developmental disabilities
John O'Donohue
• Irish Catholic scholar, poet, and philosopher
• Lecturer and workshop leader
• Expert on Celtic spirituality
M. Basil Pennington
• Trappist monk who traveled the world
• First Western Christian to spend time at Mount Ethos, a center of Eastern Orthodoxy
• Teacher of Christian practices of devotion
Hugh Prather
• Freelance philosopher
• Radio talk show host
• Minister and lecturer