Paul is engaging with a question that might arise from his previous discussions about God's sovereign choices. The question of God's justice is crucial because it touches on the very nature of God. By asking, "Is God unjust?", Paul acknowledges a common human concern: how can God's choices be fair if they seem arbitrary or beyond our understanding? His immediate and strong denial, "Not at all!", serves to affirm God's perfect justice. This statement is a reassurance that, despite our limited perspective, God operates with complete fairness and righteousness.
Paul's rhetorical question and its answer emphasize that God's ways are not subject to human standards of justice. Instead, they are rooted in divine wisdom and love. This passage encourages believers to trust in God's character, even when His actions are mysterious or challenging to comprehend. It invites us to reflect on the broader biblical narrative that consistently portrays God as just and loving, urging us to have faith in His ultimate goodness and fairness. This assurance is meant to comfort and strengthen believers, affirming that God's decisions are always aligned with His perfect nature.