Amos was a simple farmer in ancient Judah, but God had bigger plans for him. God used him to rebuke the Israelites for how they responded to “marginalized” people: the foreigner, orphan, and widow.
These categories of people come up often in the Old Testament, and God makes it clear these people are precious to Him — and need to be precious to the rest of society.
God’s dream was a society that reaches out with compassion to those in need, and treats those who don’t have power with justice. God’s dream has not changed, and it’s up to us to live according to the plumb line found in God’s Word.