What does the Bible say about Hardshellism?

Hardshellism is deeply rooted in the historical and theological understanding of God's sovereignty in salvation. The term describes those who are uncompromisingly committed to the divine revelation of Scripture, asserting that Christ's redemptive work was specifically for His chosen people. In the context of the debate during the Old School and New School controversies, the hardshell perspective emerged to uphold the belief that Christ's atonement was limited to the elect only, thus preserving the integrity of God's justice and grace as laid out in Scripture. Passages such as Ephesians 1:4-5, which speaks of those chosen in Him before the foundation of the world, underscore the doctrine of limited atonement that Hardshellism defends.