Offering the perspectives of some of the most respected thinkers in transpersonal psychology and consciousness studies, this book explores the farther reaches of knowing, both ourselves and the world, described here as transpersonal, post-conventional, or spiritual. The contributors' work is presented from their own authentic knowing, whether through personal narrative or through conceptualization informed by such knowing. They explore what "knowledge" can consist of as it stretches beyond conventional objective observation and analysis. Contributors include Arthur Deikman, Jorge Ferrer, Fred J. Hanna, Tobin Hart, Zia Inyhat Khan, Peter L. Nelson, Kaisa Puhakka, Donald Rothberg, Jenny Wade, Michael Washburn, and John Welwood.