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.

10608. 'And also no one shall be seen on all the mountain' means that they are entirely remote from that Truth, and so stand outside it. This is clear from the meaning of 'the mountain', at this point Mount Horeb, as heaven in its entirety, thus also Divine Truth. It amounts to the same thing whether you say heaven or Divine Truth, since the angels, of whom heaven consists, are recipients of Divine Truth. The full extent of that mountain was called Horeb, but the higher part in the middle was called Mount Sinai; and this is why 'Horeb' means heaven, or what amounts to the same thing, Divine Truth in its entirety. The inward aspect of that Truth is meant by Mount Sinai, and the outward by the lower parts of the mountain surrounding it. So it is that 'Horeb', when used to include those surrounding parts, means that which is external, see 10543. The interest of the Israelite nation lay in what was external and closed off to anything internal and so in what was external separated from what was internal, or what amounts to the same thing, that nation stood outside anything that had an internal aspect; and this was why the command 'no one shall be seen on all the mountain' was given. The like is meant, in verses 8-10 of the previous chapter, by that nation's standing at the door of the tent in which Moses was and their bowing down to it, see 10545-10555.

[2] Something brief must be stated here to show why it is that Mounts Horeb and Sinai mean heaven and Divine Truth. The belief in the world is that angels live in the region above the sky, where they exist like puffs of wind and have no solid ground on which to stand. The reason why such a notion exists in the minds of very many people is that they have no idea that angels and spirits exist within a form similar to that in which people on earth do, that is, that they have faces, arms and hands, and feet, in short have actual bodies. Still less do people have any idea that they have abodes or dwelling-places, when in fact angels and spirits live among others in exactly the same way as people on a planet do, on land beneath their feet. Celestial angels live on mountains, spiritual angels on rocks, and those who have not yet become angels on plains between mountains or rocks; but hellish spirits live below mountains and rocks. These things have been stated in order that people may know why it is that in the Word mountains, especially Mount Horeb and Mount Sinai, mean heaven. Furthermore the more internal angels inhabit places higher up the mountains; and the higher they are, the more internal and perfect they are. From all this it is evident why Jehovah descended onto the peak of Mount Sinai when He proclaimed the Law, and why Moses was ordered to stand with Him on the top of the mountain. The mountains on earth do not constitute heaven; rather they represent the mountains on which angels in heaven live.