Shared ground
Amos 6:12–13 uses two obvious “no” questions (horses running on rock; plowing rock with oxen) to expose how unnatural and self-defeating Israel’s public life has become. The text explicitly claims they have changed justice into something poisonous (“gall”) and turned the expected “fruit” (outcome) of righteousness into something bitter (“wormwood”). It also explicitly portrays a group celebrating “a thing of nothing” and bragging that they gained “horns” (strength/status) by their own power.
The passage assumes justice and righteousness are meant to produce life-giving outcomes in the community, especially in public decisions and treatment of people, not merely private ideals. It also assumes that self-congratulation can be deeply out of step with reality, especially when built on corrupted justice.
Where interpretation differs (only where needed)
Two main questions are debated.
First, “a thing of nothing”: some read it as a specific achievement (such as a recent military or political gain) that Amos calls meaningless; others read it more generally as empty confidence—celebrating what has no real substance.
Second, “horns”: some understand this mainly as military conquest; others take it more broadly as political power, social status, or wealth that the elites treat as proof of strength.
Why the disagreement exists
The images are intentionally compressed and poetic. The text does not name the “nothing” or specify what the “horns” refer to, and the metaphors (“gall,” “wormwood,” “horns”) can point to overlapping realities—corrupt court verdicts, harmful social outcomes, and national boasting during prosperity.
What this passage clearly contributes
The passage contributes a moral diagnosis: when justice is corrupted, the results are not neutral—they become poisonous and bitter for the community. It also links that corruption with a public posture of pride: people can celebrate “success” while the community’s moral foundation is rotting. In context (Amos’s wider critique of prosperous elites and coming reversal), the text sets up the irony that confident boasting can coexist with impending collapse Amos 6:14.