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.

4570. 'But indeed Israel will be your name' means the nature of the internal natural, or the nature of the spiritual aspect of it, represented by 'Israel'; 'and He called his name Israel' means the internal Natural or the celestial-spiritual aspect of the Natural. This is clear from the meaning of 'name' as the essential nature, dealt with just above in 4568, and from the meaning of 'Israel' as the internal aspect of the Lord's natural and also the celestial-spiritual aspect of the Natural. No one can know why Jacob was called Israel unless he knows what the internal natural is and what the external natural is, and in addition what the celestial-spiritual aspect of the natural is. These matters have in actual fact been explained already, when Jacob was named Israel by the angel; but because they are the kind of things about which people know little, if anything, they need to be explained again.

[2] Two quite distinct and separate degrees exist in man - the rational and the natural. The rational constitutes the internal man and the natural the external; but the natural, like the rational also, has an external aspect of its own and an internal one. The external aspect of the natural is composed of the physical senses and of the impressions received from the world through these senses immediately. By means of his sensory impressions a person is in touch with things belonging to the world and to the body; and people who are confined solely to this natural are called sensory-minded because their thought goes scarcely at all beyond sensory experience. But the internal part of the natural is made up of ideas inferred - by the use of analysis and analogies - from what is in the external, even though it draws on and derives its ideas from sensory impressions. So the natural is in touch through the senses with things belonging to the world and to the body, and through ideas, arrived at by the use of analogy and analysis, with the rational, thus with things belonging to the spiritual world. Such is the composition of the natural. There is another part that exists between and has links with both of them - with the external aspect and with the internal - and so is in touch through the external with things in the natural world, and through the internal with those in the spiritual world. This external natural is represented specifically by 'Jacob', and the internal natural by 'Israel'. The situation is similar with the rational; that is to say, there is an external aspect and an internal, and a further one between the two. But this, in the Lord's Divine mercy, is to be discussed where Joseph is the subject, for 'Joseph' represents the external aspect of the rational.

[3] What the celestial-spiritual is however has been stated several times already - that essentially the celestial is good and the spiritual truth, so that the celestial-spiritual is that which is good resulting from truth. Now because the Lord's Church is both external and internal, and internal features of the Church had to be represented by the descendants of Jacob through things of an external nature, Jacob could not therefore be called Jacob any longer, but was called Israel - see what has been introduced already about these matters in 4286, 4292. Further to this it should be recognized that the terms celestial and spiritual are used both of the rational and of the natural. Celestial is used when people receive good, and spiritual when they receive truth from the Lord; for the good which flows from the Lord into heaven is called celestial, and the truth is called spiritual. In the highest sense the naming of Jacob as Israel means that the Lord progressed towards more interior aspects and made the Natural within Him Divine, both the external aspect of it and the internal. For in the highest sense that which is represented is the Natural itself.