128. The worldly and bodily-minded man says at heart, Unless I am taught about faith and about things that belong to faith by means of sensory evidence so that I see for myself, that is, by facts so that I understand for myself, I am not going to believe. And he confirms himself in this attitude from the consideration that natural phenomena cannot be at variance with spiritual. Consequently it is from sensory evidence that he wishes to learn about heavenly and Divine matters. But this is no more possible than for a camel to pass through the eye of a needle. The more he wants by this method to become wise, the more he blinds himself, until in the end he believes nothing, not even in the existence of anything spiritual or in eternal life. This arises out of the basic assumption he makes. This is eating from the tree of the knowledge of good and evil. And the more he eats of it, the more dead does he become. But the person who wishes to be made wise not from the world but from the Lord says at heart that he must believe the Lord, that is, those things the Lord has spoken in the Word, because they are truths. This is the basic assumption of his thinking. He confirms himself by means of rational, factual, sensory, and natural evidence. And things that are not confirmatory he sets aside.

Dust, in Ezekiel 26:12, signifies the lowest things which are of the sensual principle of man. They can be either good or bad, depending on the context.

In Isaiah 40:12, the dust signifies exterior or natural truths and goods of heaven and the church.

In Genesis 2:7, the dust is good, and we see some interesting nuances:

First, there's this: 'To form the man, dust from the ground' is to form his external man, which had not previously been man... (Arcana Coelestia 94)

Here, this formation of our external body and mind is a precursor, setting the stage for God to "breathe into our nostrils".

In Arcana Coelestia 1610, we find this passage, where again, dust has a good signification:

'Dust of the earth' has regard to those things that are celestial, for, as shown already, 'the earth' means the celestial aspect of love; 'dust of the sea' has regard to those things that are spiritual, for 'the sea', as has also been shown, means the spiritual aspect of love; while 'as the stars of heaven' means both but in a higher degree. And because these things cannot be numbered they therefore became common expressions to describe growth and multiplication beyond measure.

Then, in Arcana Coelestia 3707, these ideas get pulled together:

The reason the dust of the earth symbolizes goodness is that the earth, [or land,] symbolizes the Lord’s kingdom and therefore goodness, as shown just above in §3705. The dust of that land, then, means goodness, but earthly goodness, since the land symbolizes what is lowest in the Lord’s kingdom....

But there are bad connotations, too. In Micah 7:14-17, licking dust symbolizes being only sensual - bodily and external, worldly, and selfish. It's much the same in Psalms 72:9, where "Barbarians will bow down before God, and His enemies lick the dust...". See Arcana Coelestia 249, 3413 for interesting explanations of this.

(Odkazy: Apocalypse Explained 1145)