[30] [cap.8] And air and light he considered worthy of the pre-eminence. For the one he called the breath of God, because it is air, which is the most life-giving of things, and of life the causer is God; and the other he called light, because it is surpassingly beautiful: for that which is perceptible only by intellect is as far more brilliant and splendid than that which is seen, as I conceive, the sun is than darkness, or day than night, or the intellect than any other of the outward senses by which men judge (inasmuch as it is the guide of the entire soul), or the eyes than any other part of the body.