6401. 'And its rider will fall backwards' means a receding from [truth]. This is clear from the meaning of 'falling backwards' as a receding from - a receding from truth; and from the meaning of 'rider' as those subject to false notions received from lowest nature. 'Horse' means those false notions, see immediately above in 6400, and therefore 'rider' means those subject to them, the nature of which meanings has been discussed immediately above. Since 'Dan' means those within the Church who are the kind of people described just above in 6396 and who are accordingly among the lowest in the Lord's kingdom, 'Dan' also means those who hatch false teachings out of false notions and disseminate them. These people's false teachings are also called 'horses', and their reasonings about truth and good are called 'serpents', in Jeremiah,

From Dan the snorting of his horses was heard; at the sound of the neighing of his strong ones the whole earth quaked. And they came and devoured the land and the fullness of it, the city and those dwelling in it. For behold, I send into you poisonous serpents which do not respond to charming; and they will bite you. Jeremiah 8:16-17.

258. In the Word there is a spiritual sense, which is called the internal sense.

No one can know what the internal sense of the Word is, unless he knows what correspondence is (n. 2895, 4322). The whole and every part, even to the most minute, of the natural world, corresponds to spiritual things, and thence is significative of them (n. 1886-1889, 2987-3003, 3213-3227). The spiritual things to which natural things correspond assume another appearance in the natural, so that they are not distinguished (n. 1887, 2395, 8920). Scarcely anyone knows at this day, where, or in what part is the Divine of the Word, when nevertheless it is in its internal or spiritual sense, which at this day is not known (n. 2899, 4989). The mystic things of the Word are nothing else than what its internal or spiritual sense contains, which treats of the Lord, of His kingdom, and of the church, and not of the natural things which are in the world (n. 4923). The prophetic parts of the Word are in many places unintelligible, and therefore of no use without the internal sense; illustrated by examples (n. 2608, 8020, 8398). As what is signified by "the white horse," mentioned in Revelation (n. 2760[1-2].). By "the keys of the kingdom of the heavens" that were given to Peter, see the Preface to the 22 nd (Arcana Coelestia 9410) chapter of Genesis (n. 9410). By "the flesh," "blood," "bread," and "wine," in the Holy Supper, and thus why it was instituted by the Lord (n. 8682). By the prophecies of Jacob concerning his sons in the 49th chapter of Genesis (n. 6306, 6333-6465). By many prophecies concerning Judah and Israel, which by no means tally with that people, nor in the literal sense have any coincidence with their history (n. 6333, 6361, 6415, 6438, 6444). Besides innumerable other instances (n. 2608).

Of the spiritual or internal sense of the Word in a summary (n. 1767-1777, 1869-1879). There is an internal sense in the whole and in every particular part of the Word (n. 1143, 1984, 2135, 2333, 2395, 2495, 2619). Such things do not appear in the sense of the letter, but nevertheless they are contained within it (n. 4442).