How can we be sure of our salvation as Christians?

The assurance of salvation comes not from our own actions but from the sufficiency of Christ's atonement and God's unchanging promises. The sermon emphasizes that believers must abide in Christ, who is the only way to the Father. In Romans 8:38-39, Paul assures us that nothing can separate us from the love of God, affirming that our salvation is secure in Him. Furthermore, God's grace both saves and sustains us throughout our lives. It is this divine grace that leads us to persevere in faith, ensuring that we do not come short of the glory of God, as seen in the example of the two and a half tribes who lost out due to their choices.