“Beholding beauty with the eye of the mind, he will be enabled to bring forth, not images of beauty, but realities (for he has hold not of an image but of a reality), and bringing forth and nourishing true virtue to become the friend of God and be immortal, if mortal man may.”

Source: Dictionary of Burning Words of Brilliant Writers (1895), p. 509.

in The Alchemist of Happiness

As quoted in "Hawthorne and His Mosses" (1851) http://www.eldritchpress.org/nh/hahm.html by Herman Melville

The Caesars (c. 361)
Context: As for the beauty of the gods, not even Hermes tried to describe it in his tale; he said that it transcended description, and must be comprehended by the eye of the mind; for in words it was hard to portray and impossible to convey to mortal ears. Never indeed will there be or appear an orator so gifted that he could describe such surpassing beauty as shines forth on the countenance of the gods.

As A Man Thinketh (1902)
Variant: Mind is the Master Power that molds and makes, And we are mind. And ever more we take the tool of thought, and shaping what we will, bring forth a thousand joys, or a thousand ills. We think in secret, and it comes to pass, environment, is but our looking glass.

Ad Leptinum 162, as quoted in Dictionary of Quotations (Classical) (1897) by Thomas Benfield Harbottle, p. 511

As quoted by the interviewer from the introduction to an Italian publlication of Antonioni's screenplays.
Encountering Directors interview (1969)