How does God's calling relate to our assurance of salvation?

In the sermon, the preacher points out that God's call to salvation is rooted in His sovereign grace and purpose. As expressed in Romans 8:30, whom He predestined, He also called, justified, and glorified. This indicates that God's calling is effective and brings about the transformation and assurance necessary for salvation. The believer's assurance rests not in feelings or circumstances but in the certainty of God’s promises, shown through His election and calling, affirming that all whom God calls will ultimately be received by Him.