Transformation is a desired outcome of Christian spirituality. Christians pray, trust, and hope that their responsive embrace of God will transform them. Interdisciplinary study of this process, as journey and as significant movements, hits upon key philosophical, theological, and psychological debates. Are all spiritualities the same core with an overlay of traditional practices and beliefs? How is the Holy Spirit involved in human life as the potential for this transformation process unfolds from birth? Can psychological theories of transformation that do not affirm divine reality have...