Donald Weiner, PhD, is a psychologist who has been teaching meditation to a variety of populations for more than 50 years and is a murshid (senior teacher) in the Inayatiyya (a Sufi Order). He has written GPS for the Spiritual Journey and Upgrading the Operating System of the Soul: A Manual of Quantum Sufism.
Donald and his wife Diane have written The Gabrielite Work–Broadband Spirituality for the 21st Century, Awakening as a Human*Divine Being, and Beyond the Wonderful: Transforming the World with the Light of Your Being. They have developed a synthesis of their work together over the years called the Gabrielite Work, which offers advanced spiritual methodology integrating contemporary scientific discoveries with the wisdom of ancient Sufi traditions.