The following passage in Isaiah discusses the Lord’s Coming and the light brought to the nations—in other words, a new church, and specifically the individuals who are in shadow but welcome the light and are being reborn.
Rise, shine, because your light has come! Look—shadows cover the earth, and darkness, the peoples. And Jehovah will dawn above you; and the nations will walk toward your light, and monarchs, toward the brightness of your rising. Jehovah will become an eternal light to you. No longer will your sun set, and your moon will not withdraw, because Jehovah will become an eternal light to you. (Isaiah 60:1, 2, 3, 19, 20)
Jehovah makes the heavens with understanding; he spreads the earth out on the waters; he makes the great lights—the sun to rule during the day and the moon and stars to rule during the night. (Psalms 136:5, 6, 7, 8, 9)
In the same author:
Give glory to Jehovah, sun and moon! Give glory to him, all you shining stars! Give glory to him, heavens of heavens and waters above the heavens! (Psalms 148:3, 4)
In all these places the sources of light symbolize love and faith.
Because lights represented and symbolized love for and faith in the Lord, the Jewish church was commanded to keep a light burning perpetually, from evening to morning, since every activity that was required of that church represented the Lord. The command for the perpetual light was as follows:
Command the children of Israel to take oil for the light, to make [the fire of] the lamp go up continually. In the meeting tent, outside the veil that is by [the ark of] the testimony, Aaron and his sons shall arrange it before Jehovah, from evening till morning. (Exodus 27:20, 21)
This symbolizes love and faith, which the Lord kindles and causes to shine in our inner self, and through our inner into our outer self.
Love and faith are first called the great lights; then love is called the greater light and faith the smaller light. It says that love will rule during the day and that faith will rule during the night. Because this information is unknown and less accessible than ever at this time—the end of an era—the Lord in his divine mercy has allowed me to lay open the true situation.
It is especially well hidden in these final days because the close of the age has arrived and almost no love exists, consequently almost no faith. The Lord himself predicted this event in words recorded in the Gospels:
The sun will go dark, and the moon will not shed light, and the stars will fall down from the sky, and the powers of the heavens will be shaken. (Matthew 24:29)
The sun here means love, which has gone dark. The moon means faith, which is not shedding light. The stars mean religious concepts (the powers and forces of the heavens), which are falling down from heaven.
from Regeneration, Pages 135-137