How do we know predestination is true according to the Bible?

The doctrine of predestination, as outlined in Ephesians 1:4, states that God chose us in Christ before the foundation of the world, indicating His sovereign selection of those who would be saved. This doctrine underscores the concept that salvation is a work initiated by God, rather than human effort or decision. Scripture consistently points to God's role in election, where the believer's identity as one of 'His people' is established through divine choice, not on the merit of individual works or decisions. Additionally, Romans 8:28-30 elaborates on this process, affirming that those whom God predestined, He also called, justified, and glorified, depicting a chain that starts with God's sovereign will and culminates in our eternal glory.