How do we know that the salvation of God's elect is secure?

The certainty of the salvation of God's elect derives from God's immutable promises and Christ's accomplished work. In Psalm 21, verses 7 and 9 highlight how the King trusts in the Lord and is upheld by divine mercy, ensuring that those given to Christ will not be moved. The New Testament reinforces this certainty with passages like Romans 8:28-30, which affirm that all things work together for good to those who love God, while John 10:28-29 declares that no one can snatch them out of Christ's hand. Such assurances demonstrate the sovereign grace that encompasses the salvation of the elect.