How do we know that salvation is only for the chosen?

In the sermon, it is highlighted that Christ's coming was to save His people from their sins, not to try to save everyone indiscriminately. This is consistent with the doctrine of election found in Ephesians 1:4-5, where it states that God chose us in Him before the foundation of the world. The story of the ten lepers underscores that while many may call upon the Lord in distress, true salvation is realized only in those whom God has chosen to reveal His grace. This sovereign choice emphasizes the certainty of salvation for the elect.