How do we know that salvation is solely by God's will?

The doctrine of salvation by God's will is heavily supported by Scripture, which illustrates that salvation cannot arise from human effort or desire but is a result of God's purpose and grace. For instance, Ephesians 1:4-5 states that God chose us in Christ before the foundation of the world, affirming His initiative in salvation. Furthermore, Romans 9:16 tells us, 'It does not therefore depend on human desire or effort, but on God’s mercy.' Consequently, this reveals that God's will is paramount in determining who receives the gift of salvation, fulfilling His gracious intent.