How does God ensure salvation for His chosen people?

God's assurance of salvation for His people is firmly rooted in His sovereign action through the Holy Spirit. In 2 Thessalonians 2:13, Paul explains that we are chosen for salvation through sanctification by the Spirit and belief in the truth. This means that God actively works in the hearts of His chosen ones to draw them to Himself, instilling faith and enabling them to respond to the gospel. This divine initiative assures us that those elected by God will indeed come to faith, confirming His promise of salvation from beginning to end.