How do we know salvation is fixed by God?

Ephesians 1:4 states that God chose us in Christ before the foundation of the world. This indicates that our salvation is not a reaction to human actions but a deliberate act of God’s will occurring in eternity past. It reflects His sovereign grace, which guarantees that every detail of our salvation is orchestrated by Him, including predestination and redemption. Moreover, the sealing of the Holy Spirit, as mentioned in Ephesians 1:13-14, serves as a divine promise of our eternal inheritance, confirming that our salvation is indeed fixed and secure.