How does God's purpose relate to predestination?

Predestination is a key doctrine in Reformed theology, emphasizing that before the foundation of the world, God chose specific individuals for salvation. Ephesians 1:4-5 states, 'He hath chosen us in Him before the foundation of the world,' illustrating that God's election is not based on foreseen merit but solely on His own purpose and grace. This doctrine reassures believers that their salvation is rooted in God's unchanging will, which brings both comfort and assurance in their faith journey.