Arcana Coelestia #1002
1002. 'Not eating' means not mixing together. This follows from what has been said above. Regarded in itself eating animal flesh is something profane, for in most ancient times people never ate the flesh of any beast or bird, but only different kinds of grain, especially wheaten bread, also the fruit of trees, vegetables, milk, and milk products such as butter. Slaughtering living creatures and eating their flesh was to them abominable, akin to the behaviour of wild animals. Service and use alone was demanded of those creatures, as is clear from Genesis 1:29-30. But in the process of time when mankind began to be as savage as wild animals, indeed more savage, they first began to slaughter living creatures and eat their flesh. And because man had become such, he was permitted to do so and is still permitted today. And insofar as he does so from conscience, it is quite legitimate, for his conscience is given form from all those things he presumes to be true and so legitimate. Consequently nobody nowadays stands in any sense condemned because he eats meat.
Genesis 1:14-19
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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:
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And let them be for lights in the firmament of the heaven to give light upon the earth: and it was so.
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And God made two great lights; the greater light to rule the day, and the lesser light to rule the night: he made the stars also.
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And God set them in the firmament of the heaven to give light upon the earth,
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And to rule over the day and over the night, and to divide the light from the darkness: and God saw that it was good.