How do we know that salvation is entirely the work of God?

The assurance that salvation is entirely the work of God rests on the teachings of scripture. The declaration in Jonah 2:9 that 'salvation is of the Lord' signifies that God alone initiates and accomplishes salvation. This is echoed throughout scripture, from Ephesians 1:4-5, which states that God chose us in Christ before the foundation of the world, to Romans 8, which details the chain of salvation that God has enacted. Each aspect—from predestination to justification—is rooted in God's will rather than any merit on part of the sinner. This biblical affirmation highlights the grace of God in salvation, as He does for us what we are incapable of doing for ourselves.