In Swedenborg's works, “enlightenment” means an ordering and linking of truths in our minds by the Lord, so that we understand them more clearly and deeply than before. Perhaps because of his intense awareness of spiritual world influences on us, Swedenborg does not advocate us seeking our own enlightenment on what is true, but instead to acquire it through hearing and obeying what the Lord reveals to us through the Word.

When people read the Word as a holy book in order to know what’s true, and think about what they are reading, they are inviting the Lord to flow into their minds, and carry out this ordering and linking process.

When someone then tries to put those truths into the acts of his or her life, the order and enlightenment are much increased. Note that the Lord doesn’t reveal new truths this way, but simply casts new light on the truths that the person has freely acquired.

Such enlightenment can go on through this life on earth and on to eternity in heaven. Some translators of Swedenborg's Latin have used the word “illustration” instead of “enlightenment.”

(Reference: Arcana Coelestia 8211, 9424, 10551, Arcana Coelestia 10551 [2]; The Word 13; The Doctrine of the New Jerusalem Regarding the Sacred Scripture 57; The Doctrine of the New Jerusalem Regarding Faith 5)

8210. 'All Pharaoh's horses, his chariots, and his horsemen — into the middle of the sea' means factual knowledge belonging to a perverted understanding, doctrinal teachings upholding falsity, and reasonings — that they filled hell. This is clear from the meaning of 'Pharaoh's horses' as factual knowledge belonging to a perverted understanding, from the meaning of 'Pharaoh's chariots' as doctrinal teachings upholding falsity, and from the meaning of 'Pharaoh's horsemen' as reasonings based on these, all dealt with above in 8146, 8148; and from the meaning of 'into the middle of the sea' as filling hell.

[2] The reason why these three that were constituents of Pharaoh's army — horses, chariots, and horsemen — are now mentioned again here is that the final state in the vastation of those belonging to the Church who have championed faith separated from charity and led a life of evil is now at hand. This state is one of being cast into hell; and being cast into hell is being crowded around by falsities arising from evil. For when all the truth and goodness residing with the evil have been laid waste and those people have been abandoned to the evil and the falsity arising from it that have ruled their lives, the hells with which they have been in contact through the evils ruling their lives are opened. From there all the evils which they have made their own rapidly converge on them, and the falsities which well out of the evils constitute then the sphere surrounding them, a sphere which looks like a thick cloud, or like water. Once all this has taken place they are in hell, for now they have been shut off from all contact with heaven, and also have been separated from other hells.

[3] The expression 'being cast into hell' is used to mean this. This is the reason why the horses, chariots, and horsemen are mentioned now, when they went into the middle of the sea; for as has been stated, 'the Sea Suph' means hell, and 'horses, chariots, and horsemen' all the falsities and everything constituting falsity arising from evil which were loosed onto those people, in order that the falsity arising from evil, by its very nature, might separate them from all other hells. These are the matters which are dealt with specifically in verses 24-28 that immediately follow.