Spiritual Experiences #1973
1973. What "evening and morning," "day," Genesis I, are
I discussed with spirits what "day" means, and what "evening and morning," Gen. I. That "day" means time in general one can very readily learn from the Scriptures, where that expression stands for time.
Arcana Coelestia #6755
6755. 'And it happened in those days, when Moses had grown up means while those states lasted, and an increase in factual knowledge holding truths within it. This is clear from the meaning of 'days' as states, dealt with in 27, 487, 488, 493, 893, 2788, 3462, 3785, 4850, so that 'it happened in those days' is while those states lasted; and from the meaning of 'growing' as an increase, as above in 6749. The fact that it is an increase in factual knowledge holding truths within it is evident from the explanation just above in 6751.