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.

4564. 'And was buried below Bethel under an oak' means cast away for ever. This is clear from the meaning of 'being buried' as being cast away, for that which is buried is cast away; and from the meaning of 'under an oak' as for ever, dealt with above in 4552. 'Below Bethel' means outside the natural, for that which is said to be beneath or below is in the internal sense outside, 2148; 'Bethel' is the Divine Natural 4089, 4539.

[2] The implication of this is that with a person who is being regenerated, neither hereditary evil nor that of his own doing is removed in such a way as to disappear or be eliminated, but is merely separated and through the rearrangement effected by the Lord is cast away to the most outlying parts, 4551, 4552. It accordingly remains with that person, and does so for ever, but he is withheld from evil by the Lord and maintained in good. When this happens it seems as though evils have been cast away and the person has been purified from them or, as it is said, made righteous. All the angels of heaven confess that in their case, insofar as anything originates in themselves it is entirely evil and consequently false, but insofar as it originates in the Lord it is good and consequently true.

[3] People who have adopted any other notion concerning this matter, and who from the teaching they received while living in the world have become convinced that they have been made righteous and are in that case without sins, and so are holy, are taken back to the state where their evils reigned - both those of their own doing and those received through heredity. They are then kept in that state until they know from personal experience that of themselves they are nothing but evil and the good which had seemed to them to be their own came from the Lord, and that therefore it was not theirs but the Lord's. This is the situation with angels, as it is with the regenerate among men.

[4] But in the Lord's case it was different. He entirely removed, cast out, and cast away from Himself all hereditary evil from His mother, for being conceived from Jehovah He had no evil by heredity from His Father, only from His Mother. This is the difference; and this is what is meant by the Lord's being made Righteousness, the Holy itself, and the Divine.