“Then arise vapors like unto smoke, and mount aloft in air, where little by little they gather and grow, until they become dark and dense, so that they take away the sight of the sun; and these are the clouds; but they never are so dark as to take away the light of day; for the sun shines through them, as if it were a candle in a lantern, which shines outwardly, though it cannot itself be seen. And when the cloud has waxed great, so that it can no longer support the abundance of water, which is there as vapor, it must needs fall to earth, and that is the rain.”