Manly P Hall - The Wisdom of the Knowing Ones Gnosticism

If any group, which shared in the Christian mystery, possessed the esoteric secrets of the early Church, it was the Gnostics. This order preserved to the end the high ethical and rational standards which confer honor upon a teaching. The Church therefore attacked Gnosticism vigorously and relentlessly, recognizing these mystical philosophers as being the most formidable adversaries to the temporal power of Christian theology