With this light that is given to the eye of the intellect, Thomas Aquinas saw Me, wherefore he acquired the light of much science; also Augustine, Jerome, and the doctors, and my saints. They were illuminated by My Truth to know and understand My Truth in darkness. By My Truth I mean the Holy Scripture, which seemed dark because it was not understood; not through any defect of the Scriptures, but of them who heard them, and did not understand them. Wherefore I sent this light to illuminate the blind and coarse understanding, uplifting the eye of the intellect to know the Truth.
from The Dialogue of St. Catherine of Siena