Thomas Aquinas
From "Proof of God's Existence" (Summa Contra Gentiles, Book I, CH 10)
"But so it is with God, for just as the light of the sun is the principle of every visual perfection, so the divine light is the principle of all intelligible knowledge, since in him especially is to be found the first intelligible light."
"But so it is with God, for just as the light of the sun is the principle of every visual perfection, so the divine light is the principle of all intelligible knowledge, since in him especially is to be found the first intelligible light."