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.

4964. 'Was made to go down to Egypt' means to factual knowledge which the Church possessed. This is clear from the meaning of 'Egypt' as knowledge, or factual knowledge in general, dealt with in 1164, 1165, 1186, 1462. But no explanation of the essential nature of that factual knowledge properly meant by 'Egypt' has been provided as yet. In the Ancient Church there was doctrinal knowledge and there was factual knowledge. Doctrinal knowledge had regard to love to God and charity towards the neighbour, whereas factual knowledge had to do with the correspondences of the natural world with the spiritual world, and with the representations of spiritual and heavenly realities within natural and earthly ones. Such was the factual knowledge of those in the Ancient Church.

[2] Egypt was one of those parts of the world and one of those kingdoms where the Ancient Church also existed, 1138, 1385; but since in that land mainly factual knowledge was handed down from one generation to another, 'Egypt' means factual knowledge in general. This also explains why frequent reference is made to Egypt in the prophetical part of the Word, where that knowledge is meant specifically by 'Egypt'. What is more, the actual magic practised by the Egyptians had its origin in the same knowledge; for they were acquainted with the correspondences of the natural world with the spiritual, and at a later time, after the Church among them had come to an end, they misused these in magical practices. Now because such factual knowledge existed among them - that is to say, knowledge which taught correspondences, and also representatives and meaningful signs - and because this factual knowledge was the servant of the doctrinal teachings of the Church, especially in their understanding of things stated in their Word (for the Word of the Ancient Church was both prophetical and historical, like the Word that exists today, though this is a different Word, see 2686) 'he was made to go down to Egypt' consequently means made to go down to the factual knowledge which the Church possessed.

[3] Because the Lord is represented by 'Joseph' and the words 'Joseph was made to go down to Egypt' are used here, the meaning is that when the Lord was to glorify His Internal Man, that is, make it Divine, He first of all assimilated the factual knowledge possessed by the Church. Then, starting from and using that knowledge He advanced towards things increasingly interior and at length even to those that were Divine. For it pleased Him to glorify or make Himself Divine in conformity with the same kind of order as that by which He regenerates the human being or makes him spiritual, 3138, 3212, 3296, 3490, 4402. That is to say, there is a gradual advance from external ideas, which are known facts and the truths of faith, towards internal ones, which are ideas of charity towards the neighbour and of love to Him. From this one may see what is meant by the following words in Hosea,

When Israel was a boy I loved him, and out of Egypt I called My son. Hosea 11:1.

These words refer to the Lord, see Matthew 2:15.