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

The doctrine of salvation by God's will is well-founded in scripture, particularly in John 1:13, which clarifies that those who are born again do not owe their new life to bloodlines or human will but to the will of God. This underscores the belief in total depravity, where humans, in their unregenerate state, lack the ability to choose God. The natural man cannot comprehend spiritual things, reinforcing that it is through divine intervention and not human decision that one comes to faith. The work of salvation is initiated and completed solely by God, who has chosen and called His elect from before the foundation of the world.