https://www.humanreligions.info/tags/darwin_gross.html
Human Truth Foundation pages (3):
Dreams, Religion and Magic: A Long History of Misunderstanding: 4. Case Study: The New Age Religion of Eckankar
Eckankar: The Religion of the Light and Sound of God, The Ancient Science of Soul Travel
A Skeptical Take on Psi, Parapsychology and Other Supernatural Phenomenon: 4.3. Eckankar: The Religion of the Light and Sound of God, The Ancient Science of Soul Travel