6398. 'Dan will be a serpent on the road' means their reasoning regarding truth, since good does not as yet lead them. This is clear from the representation of 'Dan' as those guided by truth but not as yet by good, dealt with above in 6396; from the meaning of 'a serpent' as reasoning based on sensory evidence, dealt with below; and from the meaning of 'the road' as truth, dealt with in 627, 2733. Thus 'Dan is a serpent on the road' means their reasoning regarding truth, since good does not as yet lead them. The nature of that reasoning and the nature of the truth resulting from it will be stated below.

[2] The reason why 'a serpent' means reasoning based on sensory evidence is that the interiors of a person are represented in heaven by living creatures of various kinds, and therefore in the Word similar things are meant by those same creatures. A person's sensory powers have come to be represented by serpents because they are the lowest of his mental powers. Compared with other mental powers those of the senses are on the ground so to speak, crawling around there, as may also be recognized from the forms that sensory impressions adopt when they enter in, which will in the Lord's Divine mercy be dealt with elsewhere. This explains why those sensory powers have come to be represented by 'serpents', so much so that the Lord's Divine sensory perception was represented by the bronze serpent in the wilderness, 4211 (end).

[3] True shrewdness and circumspection - qualities that reveal themselves in external affairs - were also meant by 'serpents', in Matthew,

Be shrewd as serpents and simple as doves. Matthew 10:16.

But in the case of a person who is governed by his senses and is far removed from what is internal - as those people are who are guided by truth but not as yet by good - and who speaks as his senses tell him, 'a serpent' means false reasoning. This therefore is why here, where Dan is the subject, reasoning regarding truth because good does not as yet lead him is meant. In other contexts ill-will, deceitfulness, and trickery are also meant by 'serpents', though in those places they are poisonous serpents - such as vipers and the like - whose reasoning is their poison.

'A serpent' is reasoning based on sensory evidence, see 195-197.

'A serpent' is all evil in general, and evils are distinguished from one another by different kinds of serpents, 251, 254, 257.

251. The reason 'the serpent' is used to mean all evil in general and self-love in particular is that all evil has originated in sensory evidence and also factual knowledge, which are what the serpent meant first. Consequently it now means evil itself, of every kind, and in particular self-love, or hatred of the neighbour and the Lord, which is the same as self-love. Because this evil or hatred is manifold, there being many genera of it and even more species, it is referred to in the Word by means of different kinds of serpents, such as snakes, adders, asps, haemorrhes, presters or fiery serpents, flying as well as creeping serpents, and vipers.

[2] These vary according to differences of poison, which is hatred, as in Isaiah,

Rejoice not, O Philistia, all of you, that the rod which smites you has been broken, for from the serpent's root will come forth an adder, and its fruit will be a flying prester. Isaiah 14:29.

'Serpent's root' means sensory evidence and factual knowledge, 'adder' evil that is the outcome of falsity arising from these, 'flying prester' desire which is the product of self-love. Similar references appear in the following from the same Prophet,

They hatch adder's eggs, and weave spider's webs; he who eats their eggs dies, and when it is pressed out a viper is hatched. Isaiah 59:5.

The serpent mentioned here in Genesis is in the Book of Revelation called 'the great fiery-red dragon', and 'the serpent of old', and also 'the devil and satan who leads the whole world astray', Revelation 12:3, 9; 20:2. Here and elsewhere devil is never used to mean some devil who is the prince of the rest but the entire crew of evil spirits, and evil itself.