Romans 9:30
30What shall we say then? That the Gentiles, who didn’t follow after righteousness, attained to righteousness, even the righteousness which is of faith;
Wesley: the gentiles, who followed not after righteousness—who a while ago had no knowledge of, no care or thought about it—have attained to righteousness, or justification: even the righteousness which is by faith. This is the first conclusion from all that has been said (vv. 14–29).
Here is the Arminian hinge of the chapter: individuals still believe, and they attain by faith. Gentile righteousness is not a secret list they never heard; it is the righteousness of faith. Potter and mercy (9:14–29) named God’s right to fix terms; they do not cancel this attainment. God accepts those who believe.
Calvin: nothing appeared more unreasonable than that Gentiles who had no concern for righteousness should be called to obtain it, while Jews who labored in the law were excluded. Paul adds the reason: the righteousness the Gentiles attained was by faith, and hence depends on the Lord’s mercy, not on man’s own worthiness.
Calvin will not let faith become the first cause. The Gentiles could not have obtained righteousness by faith except God had anticipated their faith by his grace; faith itself is a portion of his favor. Secret predestination remains the first cause; those He deigned to embrace when unworthy obtained. Faith is the instrument; God’s purpose explains who believes.
Key contrast Arminian readings take Gentile attainment as the chapter’s hinge after potter and mercy: righteousness is by faith, individuals still believe, and 9:14–29 does not nullify a living response. Reformed readings typically take the same faith as instrument, yet (Calvin) God anticipated their faith by grace; secret predestination is the first cause of who attains.