In chapter 4 of the Book of Amos, verses 1-3 are talking about people who pervert the truths of the church. They will fall into falsities in outermost things.

In the Bible, fish represent "lower" things than mammals, so we can interpret the fishhooks in verse 2 as meaning being caught and held fast in natural or lower things.

Verses 4-6 are about acts of worship such as tithes and sacrifices. These look similar to genuine worship, but are only external sorts of things. We can tell because ‘teeth’ (in verse 6) represent ultimates or outermost things (see Secrets of Heaven 6380). It follows that “cleanness of teeth” would mean outermost things that look good but only imitate genuine worship. The Lord exhorts, “Yet you have not returned to me.”

Verses 7-8. Some things true will remain, when where there are too many false ideas, the truths don't get through. This can be seen where the Lord says, “I made it rain on one city; I withheld rain from another city... where it did not rain the part withered.” Again the Lord exhorts, “Yet you have not returned to me.”

Verse 9. Afterward all things of the church are falsified, shown by blight attacking the gardens, vineyards, fig tree and olive trees. The last three represent spiritual, natural and celestial things, or all the things of spiritual life. “Yet you have not returned to me,” says the Lord.

Verses 10-11. The Lord explains the devastating things he allowed to happen: plague in Egypt, death of young men by swords, stench in the camps, Sodom and Gomorrah. This is because they are profaned by sensual knowledges. Profanation means the mixing of good and evil together. (See Secrets of Heaven 1001[2]).

This extends to all things of the church, with the church being the Lord’s kingdom on earth (Secrets of Heaven 768[3]).

With profanation “as soon as any idea of what is holy arises, the idea of what is profane joins immediately to it,” (Secrets of Heaven 301).

Now there is hardly anything left. “Yet you have not returned to Me,” says the Lord again.

Verses 12-13: Because people adamantly remain in their profane ways, they are warned, “Prepare to meet your God!”. This is the God powerful and mighty, “who forms mountains, and creates the wind,” and even more close to home, “Who declares to man what his thought is.” As intimately a knowing as that is, the Lord’s love for all humanity is contained in His exhortations for them to turn themselves to Him.

See, for example, Luke 6:44-45, and True Christian Religion 373.

1514. Spheres are also made perceptible to the senses by means of odors, which spirits smell far more keenly than men do; for, remarkably, odors correspond to spheres. With people who have given themselves up to the practice of deceit and have as a consequence acquired a deceitful disposition, there is a stink of vomit when their sphere is converted into an odor. With those who have studied how to speak eloquently so that it may all lead to self-admiration, their sphere when converted into something odoriferous is like the smell of burnt bread. With those who have given themselves up to the pursuit of mere pleasure and with whom no charity or faith has existed, the odor of their sphere is that of excrement. It is similar in the case of those who have gone through life committing adultery, whose odor is even more obnoxious. With those who have led lives of intense hatred, of revenge, and of practicing cruelty their sphere, when converted into odors, is the stench of a corpse. From those who have been disgustingly avaricious the stench of mice is given off, and the stench of house-lice or bugs comes from those who persecute the innocent. These odors cannot be detected by anyone unless his interior senses have been opened in such a way that he is at the same time in the company of spirits.