He came to associate the expanded quantity of data with communications from the Spiritual or Eternal World. The natural eye became a metaphor for the visionary eye. If the eye had been modified to be less able to discern eternal truth as it became part of the material creation, it could again be modified to be an instrument for seeing the unseen world of infinity and eternity. When Blake talks of seeing through the eye he is proposing that the eye be used to see through the layers of obfuscating, distorting filters which are created by our minds and our preconceived structures of reasoning.
Marriage of Heaven & Hell, Plate 9, (E 37) The eyes of fire, the nostrils of air, the mouth of water, the beard of earth. Visions of the Daughters of Albion, Title Page, (E 45) "The Eye sees more than the Heart knows." Book of Urizen, Plate 25, (E 82) "The Senses inward rush'd shrinking, Beneath the dark net of infection. 2. Till the shrunken eyes clouded over Discernd not the woven hipocrisy But the streaky slime in their heavens Brought together by narrowing perceptions Appeard transparent air; for their eyes Grew small like the eyes of a man" Milton, Plate 12, (E 156) And the Eyes are the South [reason], and the Nostrils are the East [emotion]. And the Tongue is the West [sensation], and the Ear is the North [imagination]. Mental Traveller, (E 485) "The Guests are scatterd thro' the land For the Eye altering alters all The Senses roll themselves in fear And the flat Earth becomes a Ball" Songs and Ballads, Auguries of Innocence, (E 492)
British Museum Night Thoughts, Edward Young
"Every Night & every Morn Some to Misery are Born Every Morn & every Night Some are Born to sweet delight Some are Born to sweet delight Some are Born to Endless Night We are led to Believe a Lie When we see not Thro the Eye Which was Born in a Night to perish in a Night When the Soul Slept in Beams of Light God Appears & God is Light To those poor Souls who dwell in Night But does a Human Form Display To those who Dwell in Realms of day"There is a birth to night in which the Soul is asleep without realizing it. The sleeping, dreaming state deceives the dreamer by hiding reality thereby creating a lie. Awaking to the light of day allows man to look through his eye to see the Eternal Great Humanity Divine of which he partakes.
Everlasting Gospel, (E 520) "In Doubt which is Self Contradiction Humility is only Doubt And does the Sun & Moon blot out Rooting over with thorns & stems The buried Soul & all its Gems This Lifes dim Windows of the Soul Distorts the Heavens from Pole to Pole And leads you to Believe a Lie When you see with not thro the Eye That was born in a night to perish in a night When the Soul slept in the beams of Light."