The complete Secret Teachings of All Ages is in the public domain and legally available as a PDF. However, specific "Pineal Gland: Eye of God" compilations are of dubious origin. I recommend accessing Hall’s original chapter on "The Human Body in Symbolism" for the authentic text.
While modern science recognizes the pineal gland primarily as a tiny endocrine gland that produces melatonin and regulates sleep cycles [Source: Healthdirect ], Manly P. Hall viewed it through a metaphysical lens. He believed the physical organ is merely the shell for a higher, spiritual organ of perception. the pineal gland the eye of god manly p hall pdf
Pineal Gland: What It Is, Function & Disorders - Cleveland Clinic The complete Secret Teachings of All Ages is
Manly P. Hall, particularly in his seminal work The Secret Teachings of All Ages , pointed out that ancient anatomists were well aware of this hidden chamber. He noted that the pineal gland is bathed in cerebrospinal fluid and sits in close proximity to the pituitary gland, creating a biological polarity that mystics refer to as the spiritual spark of consciousness. Manly P. Hall and the Eye of God While modern science recognizes the pineal gland primarily