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.

3035. 'Jehovah, the God of heaven' means the Lord's Divine itself. This is clear from what has been stated above in 3023 - that 'Jehovah, the God of heaven' is the Lord's Divine itself, for the name 'Jehovah', which occurs so many times in the Old Testament Word, was used to mean the Lord alone. Every single detail there refers in the internal sense to Him, and every single religious observance of the Church represented Him, see 1736, 2921. Furthermore the most ancient people who belonged to the celestial Church did not mean by 'Jehovah' anyone other than the Lord, 1343. Here and elsewhere in the sense of the letter it seems as though someone other, who is higher, is meant by Jehovah; but the sense of the letter is such that it sets forth as separate entities things which the internal sense presents as one. The reason for this is that man who has to be taught from the sense of the letter is unable to have the idea of one without first of all having the idea of several. For with man that which is a single whole is formed from several parts, or what amounts to the same, things existing simultaneously come into being consecutively. Many attributes exist in the Lord, and all are Jehovah, and therefore the sense of the letter regards these as separate entities, whereas heaven never does so. Heaven acknowledges one God with an idea that does not divide Him; nor does it acknowledge anyone other than the Lord.