How do we know that salvation is a work of Christ?

Salvation is solely the work of Christ as He proclaims in passages such as John 17:26 and Colossians 1:27. The Bible emphasizes that it is Christ who must bind the strong man (Satan) to remove him from a person's life. Without this divine intervention, any attempt to clean up one’s life results in being spiritually empty, as illustrated in Matthew 12:43-45. Only when Christ takes up residence in a believer’s heart does true transformation occur. This internal work is further supported by Ephesians 2:8-9, which states that we are saved by grace through faith, not by our own works, ensuring that all glory belongs to God alone for our salvation.