What does the Bible say about the security of salvation?

The doctrine of salvation security is affirmed in scriptures like Romans 8:28-30, which emphasizes that God’s purpose for believers is firmly established in His foreknowledge and predestination. This means that salvation is not contingent upon our efforts or decisions; instead, it is entirely of the Lord. As Wayne Boyd explains, if salvation depended on human actions—like praying a prayer or exercising free will—it could be lost; but since true salvation is granted by God, it is eternally secure. God's grace ensures that those whom He calls and justifies are also glorified, illustrating the unbreakable chain of salvation from beginning to end.