'Jericho' generally signifies the good of truths.

In Luke 10:30, this signifies the church in possession of the knowledges of truth and good.

In Joshua 6:1, 'Jericho' signifies instruction and the good of life because no one can be instructed in the truths of doctrine but he who is in the good of life. In an opposite sense, it signifies the profanation of truth and good. (Apocalypse Explained 700)

(参照: Luke 10)

Chaldea was a land lying along the Euphrates river near its mouth, south of Babylon, part of what is now southern Iraq. It was a land of the Lord's second great church, the Ancient Church, which at its height had a wealth of knoweldge through its own sacred scriptures and the correspondences of nature. But as this church declined Chaldea came to represent people who use truths for evil purposes and thus profane and falsify them. Abram was born in Chaldea because of the greatness it had represented, but had to leave because of what it had become.