What does predestination mean in Christianity?

Predestination is a core aspect of sovereign grace theology, emphasizing that God, in His sovereignty, has chosen certain individuals for salvation before the foundation of the world (Ephesians 1:4-5). This concept underscores that salvation is not a result of human decision or merit but solely based on God's grace and purpose. It affirms that God actively works in the hearts of the elect, bringing them to faith in Christ, as outlined in Romans 8:29-30. Thus, predestination assures believers of God's unchanging plan, offering them comfort and security in His divine and loving sovereignty. It also highlights the magnitude of grace, demonstrating that salvation is entirely of the Lord.