Romans 3:9
9What then? Are we better than they? No, in no way. For we previously warned both Jews and Greeks that they are all under sin.
Are we better than they? For we previously warned both Jews and Greeks that they are all under sin. Wesley: here he resumes verse 1. Under sin—under the guilt and power of it: the Jews by transgressing the written law; the Gentiles by transgressing the law of nature.
Both camps must say this together first: advantage in oracles (v. 2) is not advantage in standing. Arminian readers take the "no" as honest. All are under sin’s guilt and power. This is the common ruin 3:21–31 will answer by grace, not a leftover capacity that could found a boast.
Calvin: he returns from digression. The privileges in which they were eminent were separate from themselves, dependent on God’s goodness, not their merit. Here he inquires as to their own worthiness. To be under sin means we are justly condemned as sinners before God, or held under the curse due to sin; as righteousness brings absolution, so sin is followed by condemnation.
He puts himself among them ("are we") to avoid offense, then strips all dignity that would be their own. The forensic charge already laid in chapters 1–2 now covers both. Under sin is curse-standing, not a mild deficit. Both camps need this verse to prepare 3:21: mercy alone will justify, because all are under sin.