Amos 3 speaks of God’s special relationship with the people of Israel. He has chosen them and they have rejected him. Therefore, they will be punished. This punishment is presented as a sure thing. This is done through a series of rhetorical questions that seem to state the obvious. Therefore, this retribution is just as obvious.
Verse 7 tells us that God uses his prophets to reveal his plans. This is so his people can know about it.
The plan is that the people of Israel will be overrun by its enemies and will be destroyed.
Amos uses some farming similes, that reflect his status. Israel will be like the remains of a lamb pulled from a lion’s mouth. There will only be scraps left.
At the end of the chapter you get an idea of Israel’s wealth. There are winter palaces and summer palaces and houses adorned with ivory. This isn’t a poor pitiful nation. They are rich and they are well off. And they have abandoned the Lord.
This, like Amos 2, is scary. Symbols of wealth are all around us: holiday homes, big houses, lavish decor. These thing are pointless if you do not follow the Lord; these things can’t save you and these things will be gone when judgment comes.