What does the Bible say about God's eternal purpose in salvation?

Ephesians 1:4-5 states that God chose us in Christ before the foundation of the world, showing that salvation is based on His sovereign will and not on human efforts. This reflects the doctrine of election, which emphasizes that God's choice is not determined by anything in me but rather by His own purpose and grace. The mystery of how God saves sinners is a central theme in the Scriptures, where all blessings of salvation are tied to God's eternal decree and the person of Christ. Thus, the natural man cannot comprehend this mystery without divine revelation.