6398. Dan shall be a serpent upon the way. That this signifies their reasoning about truth because good does not as yet lead, is evident from the representation of Dan, as being those who are in truth and not yet in good (see n. 6396); from the signification of a “serpent,” as being reasoning from what is sensuous (of which in what follows); and from the signification of “way,” as being truth (n. 627, 2333). Thus by “Dan being a serpent upon the way” is signified their reasoning about truth, because good does not yet lead. The quality of this reasoning and of the consequent truth, will be told in what follows.

[2] That a “serpent” denotes reasoning from what is sensuous, is because the interiors of man are represented in heaven by animals of various kinds, and hence in the Word the like are signified by the same animals. The sensuous things of man were represented by serpents because sensuous things are the lowest things in man, and are relatively earthly, and as it were creeping; as may also be seen from the forms through which sensuous things flow, concerning which, of the Lord’s Divine mercy elsewhere. Hence these sensuous things were represented by serpents, and even the Lord’s Divine sensuous was represented by the brazen serpent in the wilderness (n. 4211); and prudence and circumspection, in externals, is signified by “serpents” in Matthew:

Be ye wise as serpents, and harmless as doves (Matthew 10:16).

But when a man is in what is sensuous, remote from what is internal, as are those who are in truth and not yet in good, and speaks from what is sensuous, then by the “serpent” is signified reasoning; here therefore, where Dan is treated of, is signified reasoning about truth, because good does not yet lead. In other cases malice, cunning, and deceit, are signified by “serpents,” but by poisonous serpents, as by “vipers” and the like, the reasoning of which is poison. (That the “serpent” denotes reasoning from what is sensuous may be seen above,n. 195-197; also that the “serpent” denotes all evil in general; and that evils are distinguished by different kinds of serpents n. 251, 254, 257)

257. That by the “head of the serpent” is meant the dominion of evil in general, and specifically of the love of self, is evident from its nature, which is so direful as not only to seek dominion, but even dominion over all things upon earth; nor does it rest satisfied with this, but aspires even to rule over everything in heaven, and then, not content with this, over the Lord himself, and even then it is not satisfied. This is latent in every spark of the love of self. If it were indulged, and freed from restraint, we should perceive that it would at once burst forth and would grow even to that aspiring height. Hence it is evident how the “serpent” or the evil of the love of self, desires to exercise dominion, and how much it hates all those who refuse its sway. This is that “head of the serpent” which exalts itself, and which the Lord “tramples down” even to the earth, that it may “go upon its belly, and eat dust” as stated in the verse immediately preceding. Thus also is described the “serpent” or “dragon” called “Lucifer” in Isaiah:

O Lucifer, thou hast said in thy heart, I will ascend the heavens, I will exalt my throne above the stars of God, and I will sit upon the mount of the congregation, in the sides of the north, I will ascend above the heights of the cloud, I will be made equal to the Most High; yet thou shalt be brought down to hell, to the sides of the pit (Isaiah 14:12-15).

The “serpent” or “dragon” is also described in the Revelation in regard to the way in which he exalts his head:

A great red dragon, having seven heads, and ten horns, and many diadems upon his heads; but he was cast into the earth (Revelation 12:3, 9).

In David:

The saying of Jehovah to my Lord, Sit Thou at My right hand, until I make Thine enemies Thy footstool: Jehovah shall send the rod of thy strength out of Zion, He shall judge the nations, He hath filled with dead bodies, He hath bruised the head over much land; He shall drink of the brook in the way, therefore shall He lift up the head (Psalms 110:1-2, 6-7).