Seeing through a glass darkly

"Faith, the theologians say, is a certain and obscure habit of soul. It is an obscure habit because it brings us to believe divinely revealed truths which transcend every natural light and infinitely exceed all human understanding. As a result the excessive light of faith bestowed on man is darkness for him, because a brighter light will eclipse and
suppress a dimmer one. The sun so obscures all other lights that they do not seem to be lights at all when it is shining, and instead of
affording vision to the eyes it overwhelms, blinds, and deprives them of vision, since its light is excessive and unproportioned to the
visual faculty. Similarly the light of faith in its abundance suppresses and overwhelms that of the intellect. For the intellect, by its own power, comprehends only natural knowledge, thought it has the potency to be raised to a supernatural act whenever our Lord wishes."

St. John of the Cross
The Ascent of Mount Carmel