'To howl' signifies grief caused by vastation.

In Ezekiel 32:18, this signifies grief on account of their damnation. (Apocalypse Explained 659[4])

In Micah 1:8, this signifies the grief of the angels and of the men of the church. (Apocalypse Explained 695[24])

In Matthew 13:42, this signifies the grief of sensuous men in their opposition to truths. (Apocalypse Revealed 435)

In Revelation 18:9, this signifies people in control in the church mourning from embarrassment at the loss of wealth. (Apocalypse Revealed 467)

(Odkazy: Apocalypse Explained 406)

1200. That 'Canaan' means external worship that has nothing internal within it has been shown already where Canaan was the subject. The type of external worship which is called 'Canaan' is similar to that of the Jews before the Lord's Coming, and after it as well. They had an external worship, which they also celebrated meticulously, yet they were unaware of what is internal, indeed so unaware of it as to imagine that they lived solely with a body. Of the soul, or faith, or the Lord, or spiritual and celestial life, or life after death, they were totally ignorant. Consequently very many in the Lord's time said that there was no resurrection, as is clear in Matthew 22:23-33; Mark 12:18-27; Luke 20:27-40. When a person is such that he does not believe he will live after death, he also does not believe in the existence of anything internal which is spiritual and celestial. This applies also to people whose lives are sunk in wholly evil desires because they lead merely bodily and worldly lives, especially those who are steeped in filthy avarice. They nevertheless have worship, some going to synagogue, or to church, and taking part in the services, some most meticulously. But because they do not believe in a life after death their worship is inevitably external worship having nothing internal within it, like a shell without a nut, and like a tree on which there is no fruit or even leaves. Such external worship is meant by 'Canaan'. All other types of external worship dealt with above were forms of worship that had internal things within them.