'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)

779. Verse 2 (Revelation 13:2). And the beast which I saw was like unto a leopard, and his feet were as of a bear, and his mouth as the mouth of a lion; and the dragon gave him his power and his throne and great authority.

2. "And the beast which I saw was like unto a leopard," signifies reasonings that are discordant, and yet appear as if they cohere n. 780; "and his feet were as of a bear," signifies from natural things, which are fallacies n. 781; "and his mouth as the mouth of a lion," signifies reasonings from falsities destroying the truths of the Word (n. 782); "and the dragon gave him his power and his throne and great authority," signifies that those who separate faith from life support and corroborate their doctrinals by reasonings from fallacies, and thus powerfully seduce n. 783.