'Skins' or 'hides' signify external things, because the hide is the outermost organ of an animal where its interiors extend, the same as with a person's dermis or skin. 'Skin' corresponds to truth or to falsity in the extremes. See Arcana Coelestia 1835, 10036, and Apocalypse Explained 386. 'Skin,' as in Job 19:26, means the natural degree a person has with him after death.

In Exodus 22:27, this signifies things that are relatively external. (Arcana Coelestia 9215)

In Exodus 34:29, this signifies the internal of the Word shining from the external. (Arcana Coelestia 10691)

In Job 19:20, this signifies being not entirely in falsities. (Apocalypse Explained 556[11])

In Jeremiah 13:23, this signifies that evil cannot change its nature. (Apocalypse Explained 780[5])

In Genesis 3:21, this signifies that the Lord instructed them in spiritual and natural good. (Arcana Coelestia 292)

In Genesis 27:16, this signifies the external truths of domestic good. (Arcana Coelestia 3540)

1835. That 'Abram drove them away' means that the Lord put them to flight is clear from what has been stated. The position is the same with regard to the Church. When it starts to depart from charity, evils and derivative falsities are quite easily put to flight, for it is still in a state not far removed from charity, and so people's minds are quite pliable. In the course of time however evils and derivative falsities increase, and so are confirmed and consolidated. This matter will be dealt with later on.

[2] As far as it is possible the Lord is constantly putting evils and falsities to flight, but He does so by means of conscience. When the bonds of conscience are loosed no channel exists by which the Lord may flow in, for the Lord's influx with man is an influx by way of charity into his conscience. But when this comes about a new channel, an external one, is formed and takes the place of charity, that is to say, influx now comes through a fear of the law, fear of loss of life, honour, wealth, and consequent reputation. But these bonds are not those of conscience; they are merely external bonds which enable a person to live in society with others and to appear friendly, whatever he may be like within.

[3] This channel, or these bonds, are of no value whatever in the next life, for in that life things that are external are taken away, and such as the person is within remains. There are very many who have led good lives, private and public, have harmed no one, and have performed acts of friendship and kindness; indeed they have done good to very many. Yet they acted solely for themselves, for the sake of honour, gain, and similar considerations. In the next life these are among those in hell since they have nothing good and true within them at all, only evil and falsity. Indeed they have nothing but hatred, revenge, cruelty, and adultery within them, which do not show themselves before anyone - not showing themselves, that is, insofar as those fears which constitute external restraints prevail.