How do we know that election is a biblical doctrine?

The doctrine of election is thoroughly supported throughout Scripture, particularly in passages like Ephesians 1:4-5, where Paul articulates that God chose us in Christ before the foundation of the world. This pre-temporal choice underscores God's sovereignty in salvation, emphasizing that it is rooted in His will rather than human merit or decision. The biblical narrative consistently presents God as the initiator of salvation, highlighting His grace toward those whom He elects. Furthermore, Romans 8:28-30 provides a comprehensive view of God's redemptive plan, showing that those whom He foreknew, He predestined, called, justified, and glorified. Thus, the doctrine of election not only aligns with the broader themes of grace and sovereignty in the Bible but fundamentally reassures believers that their salvation is secured by God's purposeful will and not based on their efforts or decisions.