In Genesis 1:24, beasts signify the things of man's will or loves. (Arcana Coelestia 44, 46)

In Genesis 9:10, beasts signify all that was living in the man of the Ancient Church, and also what belonged to his new will; likewise the lower things of his understanding and the will therefrom. (Arcana Coelestia 1026-1029)

In Psalm 104:20, beasts signify affections longing to be instructed, or spiritually nourished. (Apocalypse Explained 650[10])

In Luke 10:35, since the beast was a donkey, this signifies to instruct another according to his capability. (Apocalypse Explained 1154)

The beast of the south (Isaiah 30:6) signifies people who are principled in the knowledges of good and of truth, but do not apply them to life and instead to science.

Every beast and creeping thing (Genesis 8:19) signifies the goodnesses of the internal and external man.

"Beasts" represent the affection for doing good things, a true desire to do them from the heart. In the negative sense, "beasts" stand for the lust to do evil.

The beast ascending out of the sea (Revelation 13:1) signifies reasonings from the natural man confirming the separation of faith from life.

(References: Apocalypse Explained 13, 773; Revelation 13:11)

139. In ancient times those who were guided as celestial people by the Lord were said 'to dwell alone', for the reason that evil forces, or evil spirits, were infesting them no longer. This was also represented in the Jewish Church by their dwelling alone after the nations had been driven out. For this reason several times in the Word the Lord's Church is described as 'alone', as in Jeremiah,

Rise up, go up against a nation at ease that dwells securely. It has no gates or bars; they dwell alone. Jeremiah 49:31.

In the prophecy of Moses,

Israel dwelt securely, alone. Deuteronomy 33:28.

And plainer still in Balaam's prophecy,

See, a people, it dwells alone, and is not reckoned among the nations. Numbers 23:9.

Here 'nations' stands for evils. These descendants of the Most Ancient Church did not wish to dwell alone; they did not wish to be a celestial man, that is, to be guided as a celestial man by the Lord, but to be among the nations, as also did the Jewish Church. And since this was what they desired it is said, 'It is not good that the man should be alone'. Indeed when this is what a person desires, he is already under the influence of evil, and his wish is granted.