'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)

6229. 'God Shaddai showed Himself to me in Luz in the land of Canaan' means the Divine appearing within the natural in a previous state. This is clear from the meaning of 'God Shaddai' as the Divine, for He who was the God of Abraham, Isaac, and Jacob was called Shaddai, 3667, 5628, and was Jehovah Himself or the Lord, thus the Divine, as may be seen from Genesis 28:13, 19; from the meaning of 'showed Himself to me' as the fact that He appeared; from the meaning of 'Luz' as the natural in a previous state, dealt with in 4556; and from the meaning of 'the land of Canaan' as the Church, dealt with before. From all this it is evident that 'God Shaddai showed Himself to me in Luz in the land of Canaan' means the Divine appearing within the natural where the spiritual Church's truth existed.