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.

2179. 'Abraham ran to the herd' means natural good. This is clear from the meaning of 'oxen' and 'young bulls' which are members of 'the herd', dealt with in the next paragraph. That beasts which were members of the herd and those which were members of the flock mean such things as reside with man becomes clear from what has been shown in Volume One, in 45, 46, 142, 143, 246, 714, 715, 719, 776, in addition to which, see what has been stated in 1823 about the beasts used in sacrifices. It may come as a surprise to everyone that the creatures mentioned in the Word, and also those offered in the sacrifices, meant goods and truths, or what amount to the same, celestial and spiritual things; but let the origin of this surprising fact be stated briefly.

[2] In the world of spirits various representatives manifest themselves. On many occasions animals too manifest themselves before the eyes of spirits, such as horses wearing varying decorative trappings, oxen, sheep, lambs, and different kinds of other animals; and sometimes animals such as have never been seen on earth but are purely representative. Such animals seen also by the prophets and mentioned in the Word had the same origin. Animals which appear in that world are representative of affections for good and truth, and also of affections for evil and falsity. Good spirits have full knowledge of what those animals mean, and also when they see them, they gather what it is that angels are discussing with one another, for when the conversation of those angels passes down into the world of spirits it sometimes manifests itself in this manner. For example, when horses appear, the spirits know that the angels are talking about matters of the understanding; when oxen and young bulls appear, that they are talking about natural goods; when sheep appear, about rational goods and about integrity; when lambs appear, about still more interior goods and about innocence; and so on.

[3] Because the members of the Most Ancient Church had communication with spirits and angels, constantly having visions and also dreams such as the prophets had, they consequently formed a concept of what any beast meant the moment they saw it. This was how representatives and meaningful signs originated. These remained in existence for a long time after those most ancient times, and at length were so venerated because of their antiquity that writers employed mere representatives. Indeed books that were not written in that style were not very highly regarded, nor if written within the Church considered to be holy. For the same and also other hidden reasons, which will in the Lord's Divine mercy be given elsewhere, the books of the Word too were written in that style.