Amos is a real favorite of mine because he is scorching in his preaching against the injustice he saw in his home country. In 8th century (700-800 BC) the southern kingdom of Judah was doing well economically. The religious and political elite felt favored by God, so they figured they were doing things right. Amos tells them that they are wrong. A society's righteousness is not defined by how wealthy or successful it is, but by how it treats the poorest and most vulnerable. Israel's law (which instructs, but doesn't bind Christians) holds up values of protection and care for the poor and rejects profiting on other people's vulnerability. Amos calls Judah to account for how they treat the poor in powerful language. For Judah then and for us now, this is a call to repentance. I pray that each of us individually and our nation as a whole would hear God's call to repent and invitation to justice.