How do we know that God saves those who belong to Him?

In the sermon, it is stressed that the Lord will rescue those He has chosen, demonstrating His absolute power over salvation. This is supported by the lifeguard analogy, where a helpless person is saved not by their own ability but by someone who is equipped to rescue. The Scripture emphasizes God's initiative in salvation, especially highlighted in 2 Samuel 22, where God draws His people out of troubles they cannot escape from on their own. This reinforces the notion that salvation is not a matter of human effort but entirely dependent upon God's sovereign will to save, ensuring that none of His chosen ones will be lost.