In Genesis 49:12, "teeth whiter than milk" signify the Celestial Spiritual [milk] in the Lord's Natural [teeth], where Judah is here representing the Lord. (Arcana Coelestia 2184-2185).

In Psalms 3:7; 37:12, 58:6; Matthew 8:12, teeth signify the lowest natural things in man: in the genuine sense, their truths, in the opposite sense, their falsities. So the gnashing of teeth signifies the collision of falsities with truths. (Arcana Coelestia 4424[3])

In Exodus 21:27, this signifies truth in the natural, here the ultimate, which is the sensuous. (Arcana Coelestia 9062)

The tooth signifies the corporeal proprium, which is the lowest degree of man. (Arcana Coelestia 10283[12])

'Teeth,' as in Genesis 49:12, in the genuine sense, signify the natural level of life. Any hard part of the body, like bones and cartilage, corresponds to the truths and goods of the lowest natural level. 'Teeth' signify the outer edges of the life of the natural self, or the sensory level. There is a natural sensory will, and a natural sensory understanding. When the sensory levels are separated from the interior of the mind, their supposed truths are really mere falsities, and do violence to truths and destroy them. This situation appears in many passages, because sensory people do not see any truth in its own light, but engage in reasoning and altercations about everything... These altercations are heard in the hells as the gnashing of teeth. Viewed in itself, this is the collision of falsity and truth. This is the meaning of 'gnashing of teeth' in Matthew 8:12, 13:42, 50, 22:13, 24:51, 25:30, and Luke 13:28.

(Odkazy: Apocalypse Revealed 435)

7026. 'And Moses took the rod of God in his hand' means that those things were from Divine power. This is clear from the meaning of 'the rod' as power, dealt with in 4013, 4015, 4876, 4936, so that 'the rod of God' is Divine power. As may be seen above in 7011, 'the rod' means natural power while 'the hand' means spiritual power, and the natural derives its power from the spiritual; and this being so 'the rod' means power when it is being held in the hand. The origin of the meaning of 'the rod' as power lies in representatives in the next life, for there those who practise magic are seen with rods which also serve to provide them with power. This also explains why the magicians of Egypt had rods which they used in performing what seemed to be miracles, and why everywhere in their writings the ancients give magicians rods. From these considerations it may be recognized that 'a rod' is an emblem representing power, and also has a direct correspondence with it since rods are instruments through which power is actually exercised. But among magicians this involves a misuse of correspondence and is altogether ineffective except within the hells where they are, and then only within these because trickery and false impressions reign. Since there is a direct correspondence between a rod and power, Moses was commanded to take the rod in his hand and use it to do the signs. For the same reason kings have a sceptre, which is a short rod and serves as a sign of royal power. The correspondence of rod and power derives from the fact that a rod or staff supports the hand and arm, and so at the same time the body, and the hand and arm correspond to power in the Grand Man, see 878, 3387, 4931-4977, 5327, 5328, 5544, 6947, 7011.