37. As for the statement that 'the lights will be for signs, and for set times, and for days, and for years', this contains more arcana than can be presented at this point, though no arcanum at all is visible in the sense of the letter. For now only this can be said: Change in spiritual and celestial things takes place both on general and on particular scales, and is comparable to changes that take place through the day and through the year. Changes through the day are from morning to midday, from then on to evening, and through the night to the morning. Changes in the year similar, from spring to summer, from then on to autumn, and through winter to spring. These bring changes in temperature and amount of daylight, and so in the fertility of the earth. Compared to such changes are the changes that take place in spiritual and celestial things. Life without changes and variations would lead to sameness, and so no life at all. Good and truth would not be recognized and identified, let alone perceived. In the Prophets such changes are called 'ordinances', as in Jeremiah,

[Thus] said Jehovah who gives the sun for light by day and the ordinances of the moon and of the stars for light by night, These ordinances will not depart from before Me. Jeremiah 31:35-36.

And in the same prophet,

Thus said Jehovah, If I have not established My covenant of day and night, the ordinances of heaven and earth . . . Jeremiah 33:25.

But these things will in the Lord's Divine mercy be dealt with at Genesis 8:12.

6750. 'And she brought him to Pharaoh's daughter' means an affection for factual knowledge. This is clear from the representation of 'Pharaoh's daughter' as a kind of religion, dealt with in 6729, but here as an affection for factual knowledge. For a third state is what this verse describes, and at this point 'daughter' means an affection, 2362, 3963, while 'Pharaoh' means factual knowledge in general, 6015, so that 'Pharaoh's daughter' means an affection for factual knowledge. This is also evident from the train of thought in the internal sense, for since Moses represents the Lord in respect of the law of God, he could not have been brought to Pharaoh's daughter and been a son to her if she meant the kind of religion that was practised, as she had done previously. Furthermore factual knowledge is what those who are being regenerated must learn first, for that knowledge is the groundwork for things that compose the understanding, and the understanding is what receives the truth of faith, 6125, and the truth of faith what receives the good of charity. From this it may be seen that factual knowledge constitutes the first level to be laid down when a person is being regenerated.

[2] Factual knowledge also constituted the first level to be laid down in the Lord when He made His Human Divine Truth or the Divine Law. This is what is meant by the Lord's being taken to Egypt when He was a young child, Matthew 2:13-14, and so by the prophecy in Hosea,

Out of Egypt have I called My Son. Hosea 11:1; Matthew 1:15.

It has been shown quite a number of times that 'Egypt' means factual knowledge. By factual knowledge however one should understand not secular knowledge but knowledge that the Church possesses, regarding which see 4749, 4964-4966, 6004. The latter kind of knowledge is also what is meant by 'Egypt' in the genuine sense. As regards its providing the level to be laid down first, see 5901.