The third eye
The Third Eye, Shiv Netra, Divya Chakshu, Tisra Til, Brahmrendra, or Single Eye must be opened to see the Light of God. It opens when the sensory currents are withdrawn and gathered up to the seat of the soul at the eye focus behind and between the two eyebrows. Then one experiences the mysteries of the Beyond into which a Master-soul initiates a disciple during his lifetime. He gives a first-hand inner experience of conscious contact with the holy Naam -the Divine Light and the holy Sound-Current (Holy Ghost), as the lowest expression of the Divinity within. The light of the body is the eye, “if therefore thine eye be single, thy whole body shall be full of light…”.
Sant Kirpal Singh