Why do Christians believe in predestination?

Predestination is a foundational doctrine in Reformed theology that asserts God's sovereignty in salvation. Ephesians 1:4-5 declares that God chose us in Christ before the foundation of the world, signifying His divine decision independent of human actions. This doctrine assures believers that their salvation is rooted in God's grace and does not depend on their merits. Understanding predestination fosters humble reliance on God's mercy and performance, encouraging a life of faithfulness as we recognize that our standing before Him is secured by His eternal purpose.