The Spiritual Journey: Critical Thresholds and Stages of Adult Spiritual GenesisOf the many contemporary books published on the spiritual life, most will pass quietly and quickly from the scene. Those that survive are rooted in the writers' intimate knowledge of the spiritual legacy of the past, on their appreciation of the best spiritual work of our era, and on a willingness to "take over" the wisdom of behavioral psychology and the social sciences. The best and most helpful writings on spirituality are vitalized by the personal