Reformed theology interprets Romans 9:18-21 as scriptural support for unconditional election (TULIP doctrine). God sovereignly ordains some vessels 'to honor' and others 'to dishonor' (dishonorable use). This is understood not as arbitrary cruelty but as the expression of God's absolute justice and authority. The Westminster Confession of Faith articulates this as God's eternal decree regarding the fall of Adam and the election of some sinners to salvation.

Reformed interpreters argue that Paul's argument demonstrates God's right to do as he pleases, and that human beings, corrupted by sin, cannot accuse God of injustice. God's sovereignty in election is affirmed as consistent with Scripture and God's character, though the precise mechanics of how this coheres with human responsibility remain a matter of careful theological reflection.