31. That 'the great lights' mean love and faith, and are also mentioned as the sun, the moon, and the stars, is clear from various places in the Prophets, as in Ezekiel,

When I have blotted you out, I will cover the heavens and darken their stars, I will cover the sun with a cloud, and the moon will not give its light. All the bright lights in the heavens I will make dark over you, and I will put darkness over your land. Ezekiel 32:7-8.

This refers to Pharaoh and the Egyptians, who are used in the Word to mean the sensory and the factual. The meaning here is that they will have blotted out love and faith by means of sensory evidence and factual knowledge. In Isaiah,

The day of Jehovah for making the earth a desolation; for the stars of the heavens and their constellations ¹ will not give their light; the sun will be darkened in its rising, and the moon will not shed its light. Isaiah 13:9-10.

In Joel,

The day of Jehovah is coming, a day of darkness and thick darkness. The earth quakes before Him, the heavens tremble, the sun and moon are darkened, and the stars withdraw their shining. Joel 2:10.

[2] In Isaiah, in reference to the Lord's Coming and the enlightenment of gentiles, and so to a new Church, in particular to individuals who are in darkness but who are beginning to receive the light and be regenerated,

Arise, shine, for your light has come. Behold, darkness is covering the earth, and thick darkness the peoples, but Jehovah will arise upon you, and nations will walk towards your light, and kings to the brightness of your rising. Jehovah will be for you an everlasting light; your sun will no more go down nor your moon be withdrawn, for Jehovah will be for you an everlasting light. Isaiah 60:1-3, 19-20.

In David,

Jehovah makes the heavens by intelligence, He spreads out the earth upon the waters, He makes the great lights, the sun to have dominion over the day, and the moon and stars to have dominion over the night. Psalms 136:5-9.

And in the same author,

Praise Jehovah, sun and moon, praise Him, all stars of light! Praise Him, heaven of heavens, and waters that are above the heavens! Psalms 148:3-4.

[3] In all of these places 'the lights' mean love and faith. Because the lights represented and meant love and faith in the Lord, the Jewish Church was commanded to keep a light burning all the time from evening till morning, for every command which that Church received was representative of the Lord. Concerning this light it is said,

Command the sons of Israel that they take oil for the light, to cause a lamp to burn continually. In the Tent of Meeting outside the veil which is before the testimony Aaron and his sons shall tend it from evening to morning before Jehovah. [Exodus 27:20-21]

That this means the love and faith which the Lord kindles and causes to shine in the internal man, and by means of the internal man in the external man, will in the Lord's Divine mercy be shown at that point in Exodus.

Footnotes:

2231. 'That he will command his sons, and his house after him, and they will keep the way of Jehovah to do righteousness and judgement' means that from Him comes the entire doctrine of charity and of faith. This becomes clear from the meaning of 'son', 'house', 'way', 'righteousness', and 'judgement', which in short, or when their several meanings are converted into one, mean the entire doctrine of charity and of faith. For 'sons' means all who are governed by truths, 'house' all who are governed by goods, 'way' means the doctrine of faith which they are taught, 'righteousness' that doctrine in regard to good, 'judgement', in regard to truth. Doctrine regarding good is the doctrine of charity, while doctrine regarding truth is the doctrine of faith.

[2] In general there is only one doctrine, that is to say, the doctrine of charity, for, as stated in 2228, all things of faith have charity in view. No other difference exists between charity and faith than that which exists between willing what is good and thinking what is good - for one who wills what is good also thinks what is good - thus than that which exists between will and understanding. People who reflect on the matter know that the will is one thing and the understanding another. The same is also well recognized in the learned world, and it is plain to see in the case of those who will what is evil and yet from thought utter what is good. From such persons it is evident to anyone that the will is one thing and the understanding another, and thus that the human mind is divided into two parts which do not then make a single whole. Yet man was created in such a way that those two parts should constitute one single mind, and no other difference should exist between them than, to use a comparison, between that of a flame and the light shining from it. Love to the Lord and charity towards the neighbour were to be like the flame, and all perception and thought like the light shining from it. Thus love and charity were to constitute the whole of perception and thought, that is, to exist in every single part. Perception or thought regarding the essential nature of love and charity is that which is called faith.

[3] But because the human race started to will what was evil, to hate the neighbour, and to practice revenge and cruelty, with the result that the part of the mind called the will was completely corrupted, men started to make a distinction between charity and faith, and to attribute to faith all those matters of doctrine which belonged to their religion and to refer to them by the single term faith. At length they went so far as to say that people could be saved by faith alone, by which they meant their doctrine. They said that provided they believed that doctrine people could be saved no matter how they lived. Charity was accordingly separated from faith, and when that happens it is nothing else, to use a comparison, than some kind of light that has no flame, like sunlight in winter-time which is so cold and icy that the earth's vegetation languishes and dies. But faith that is derived from charity is like the light of spring-time and summer-time which causes all things to sprout and come into flower.

[4] The same may also be recognized from the fact that love and charity are celestial flame, while faith is the spiritual light that shines from it. This is also how faith and charity make a perceptible and visual presentation of themselves in the next life, for in that life the Lord's celestial manifests itself before the angels by means of a flaming radiance like that of the sun, while the Lord's spiritual manifests itself by means of the light shining from this; and that radiance and light act upon the angels and spirits interiorly according to the life of love and charity existing with them. This is the source of the joy and happiness in the next life with all their variations. These considerations show the implications of the assertion that faith alone saves.