According to Hall, the tragedy of modern humanity is that the "Eye of God" is closed.

If you want, I can:

: He also discusses the gland's biological functions, such as producing and regulating circadian rhythms

: Hall suggests that in the distant past, this organ was a primary means of conscious vision—a "cognition" rather than physical sight—that has become largely dormant in modern humans. Spiritual Alchemy : Drawing from Hermetic teachings

According to Hall, this practice gradually decalcifies the gland, causing it to vibrate. The practitioner eventually hears an internal sound—a high-pitched hum or ringing—which Hall calls the Anahata Nada (the Unstruck Sound). Once that sound stabilizes, opens.

He posits that human beings possess two distinct visual apparatuses: