Light, says the reggae-loving rocker, "is really a central theme in my music in general, in the story of Hanukkah, and in the spiritual process in general."

Read excerpts from THOMAS MERTON: A LIFE IN LETTERS: The Essential Collection edited by Willam H. Shannon and Christian M. Bochen

Howard Thurman had a profound spiritual impact on civil rights leaders like Martin Luther King Jr. Yet for much of the last half century Thurman's contributions have often been overlooked. Now, more than 20 years after his death in 1981, Howard Thurman is finding a new audience.