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14 And God said, Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days, and years:
In Psalm 68:33, this signifies the wisdom of the Most Ancient Church. (Arcana Coelestia 219)
16 God made the two great lights: the greater light to rule the day, and the lesser light to rule the night. He also made the stars.