Course XLI - Teaching 14: The Third Eye

One can control the mind by possessing and realizing this sixth Center, which gives the sixfold vision of the Universe.
Ajnâ, the True Eye of God, opens all treasures emerged from Mother Divine’s mind, to show them to the Seer in full detail.
When the power of the Sight Wheel opens the hidden eye in the solar plexus, the disciple sees the Hell swarming with mental larvae, spirits of Nature and spooks of those beings that went back to the higher worlds.
When the disciple makes his left eye more acute, he can see the Purgatory and its supra-physical world, where legions of men are sleeping, living and expecting the time to return.
But with his invisible eye, which will become visible soon and is on the brow, the disciple sees the world of Angels and Devas, where the energy moves continuously and the Cosmic Soul shapes its generating thoughts.
The spiritual eye remains locked in the hypophysis gland, and guarded by quite subtlest thousand fibers of ethereal ducts, wrapped up in seven shells, guarded by four seals, burnt by seven fires, and tinier than the quintessence of one electron. One can see the white circle, the Paradise, the Supreme Vision by means of the spiritual eye.