In Joshua 8:1-29, Ai signifies knowledge of good, and in the contrary sense confirmations of evil. (Apocalypse Explained 655[8])

In Genesis 12:8, Ai signifies part of the Lord's fourth state in advancing from obscurity to light. (Arcana Coelestia 1401)

In Genesis 12:8, Ai signifies that the Lord's state was still obscure, for Ai signifies the knowledges of worldly things, in spite of being on the east. (Arcana Coelestia 1453)

It's pretty easy for most people to read the Bible and get a sense for what “sheep” means without any help. They are simple, peaceful, trusting and willing to be led, and the image of the Lord as both a shepherd and a lamb reinforces a sense of innocence. And indeed, sheep represent people who desire what is good, to be good, and to do what is good. Arriving at such a state requires the work of a lifetime -- learning what's right, setting aside what's evil, determining to follow the Lord -- but once we arrive at such a state, we can be cared for by the Lord in peace.