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.

474. Then the angel whom I saw standing on the sea and on the land lifted up his hand to heaven and swore by Him who lives forever and ever. (10:6; 10:6) This symbolizes an attestation and testification of the Lord on His own authority.

The angel standing on the sea and on the land means the Lord (no. 470). Lifting up the hand to heaven symbolizes an attestation, here that there should be no more time (verse 6). Swearing symbolizes a testification, here that in the days of the sounding of the seventh angel the mystery of God would be concluded (verse 7). He who lives forever and ever means the Lord, as in Revelation 1:18; 4:9-10, and 5:14 above, and in Daniel 4:34. That the Lord swears on His own authority will be seen shortly.

It is apparent from this that the statement, "Then the angel whom I saw standing on the sea and on the land lifted up his hand to heaven and swore by Him who lives forever and ever," symbolizes an attestation and testification of the Lord on His own authority.

[2] That Jehovah swears or testifies on His own authority is clear from the following passages:

I have sworn by Myself; a word has gone out of My mouth (which) shall not return... (Isaiah 45:23)

I swear by Myself... that this house shall become a desolation. (Jeremiah 22:5)

Jehovah... has sworn by His soul. (Jeremiah 51:14, Amos 6:8)

...Jehovah has sworn by His holiness. (Amos 4:2)

Jehovah has sworn by His right hand and by the arm of His strength. (Isaiah 62:8)

Behold, I have sworn by My great name... (Jeremiah 44:26)

That Jehovah, which is to say, the Lord, swore by Himself or on His own authority means, symbolically, that Divine truth attests; for the Lord is Divine truth itself, and this attests of itself and on its own authority.

In addition to these passages, that Jehovah swore may be seen in Isaiah 14:24; 54:9, Psalms 89:3, 35; 95:11; 110:4; 132:11.

We are told that Jehovah swore because the church established with the children of Israel was a representational church, and the conjunction of the Lord with the church was represented by a covenant, like one made between two parties who swear to their compact. Therefore, because an oath was a part of any covenant, we are told that Jehovah swore. Still, this does not mean that He swore, but that Divine truth attests to something.

[3] That an oath was a part of any covenant is apparent from the following:

I swore an oath to you and entered into a covenant with you, so that you became Mine... (Ezekiel 16:8)

...to remember His covenant, the oath which He swore... (Luke 1:72-73; cf. Psalms 105:9, Jeremiah 11:5; 32:22, Deuteronomy 1:34; 10:11; 11:9, 21; 26:3, 15; 31:20; 34:4)

Because the covenant was representative of the conjunction of the Lord with the church, and reciprocally of the church with the Lord, and because an oath was a part of any covenant and was to be sworn on the ground of the truth in it, being sworn thus also in appeal to that truth, therefore the children of Israel were permitted to swear by Jehovah, and so in appeal to Divine truth (Exodus 20:7, Leviticus 19:12, Deuteronomy 6:13; 10:20, Isaiah 48:1; 65:16, Jeremiah 4:2, Zechariah 5:4).

After the representative constituents of the church were abrogated, however, the Lord also abrogated oaths to covenants (Matthew 5:33-37; 23:16-22).