According to Hall, the pineal gland is a key to understanding the mysteries of the universe and accessing higher realms of consciousness. He believed that the pineal gland was a portal to other dimensions and that it played a crucial role in the development of human spirituality.
In Hall’s philosophical system, the pineal gland is not merely a biological vestige (a calcified organ regulating circadian rhythms) but a dormant spiritual antenna. He frames it as the "Eye of God" – a metaphysical bridge between the physical brain and divine consciousness. Hall argues that in ancient mysteries (Egyptian, Hindu, and Greek), the pineal was recognized as the third eye, the seat of the soul, and the organ of universal intuition. Modern ignorance, he claims, has reduced it to a mere gland, while esoteric tradition holds that its activation leads to illumination, clairvoyance, and direct knowledge of the divine. the pineal gland the eye of god manly p hall pdf