When Henry David Thoreau died in 1862, friends and admirers remembered him as an eccentric man whose outer life was continuously fed by deeper spiritual currents. But scholars have since focused almost exclusively on Thoreaus literary, political, and scientific contributions. This book offers the first in-depth study of Thoreaus religious thought and experience. In it Alan D. Hodder recovers the lost spiritual dimension of the writers life, revealing a deeply religious man who, despite his rejection of organized religion, possessed a rich inner life, characterized by a sort of personal, experiential, nature-centered, and eclectic spirituality that finds wider expression in America today.At the heart of Thoreaus life were episodes of exhilaration in nature that he commonly referred to as his ecstasies. Hodder explores these representations of ecstasy throughout Thoreaus writingsfrom the riverside reflections of his first book through Walden and the later journals, when he conceived his journal writing as a spiritual discipline in itself and a kind of forum in which to cultivate experiences of contemplative non-attachment. In doing so, Hodder restores to our understanding the deeper spiritual dimension of Thoreaus life to which his writings everywhere bear witness.