How do we know predestination is true according to Scripture?

Ephesians 1:4 declares that God chose His elect in Christ before the foundation of the world, affirming the doctrine of predestination. This concept is central to sovereign grace theology, illustrating that salvation is rooted in God's sovereign choice rather than human merit. The assurance of being inscribed in the Lamb's Book of Life offers believers confidence that their salvation is secure, as it is grounded in God's eternal decree and not their transient actions. Therefore, the unchangeable nature of God’s promises is emphasized in His selection of individuals for salvation.