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.

9925. 'When he ministers' means while engaged in worship and preaching the gospel. This is clear from the meaning of 'ministering' - when said of Aaron, who represents the Lord - as worship and preaching the gospel. By this worship is meant everything representative of that worship which springs from the good of love and the truths of faith. For worship that springs from these is indeed worship; but worship devoid of them is like the shell without the nut, and like the body without the soul. This is what the worship among the Jewish and Israelite nation was like, since their worship did no more than represent inward things, which are those of love and faith, as has been stated. Even so, the Lord saw to it that such worship should be discerned in the heavens, so that through it a link with mankind might be established, not through inner things but through the correspondences of these with outward things, regarding which, see the places referred to in 9320 (end), 9380. This worship is what is meant by Aaron's ministering.

[2] The reason why preaching the gospel is also meant is that preaching the gospel implies all those things in the Word which have to do with the Lord, and all those in worship which served to represent Him. For preaching the gospel involves declaring the truth about the Lord, about His Coming, and about the things of which He is the author, namely things that belong to salvation and eternal life. And since everything in the Word in its inmost sense has to do solely with the Lord, and also everything in worship served to represent Him, the whole of the Word is the gospel, as likewise was all the worship which was performed in accord with what was commanded in the Word. And since the priests had charge of worship, and also gave instruction, worship and preaching the gospel were meant by their ministry.