How do we know that God chooses a specific people for salvation?

The doctrine of election, or God's choice of specific people for salvation, is rooted in numerous biblical texts which affirm His sovereign grace. For instance, in John 15:16, Jesus states, 'You have not chosen me, but I have chosen you,' clearly indicating that the choice is God's sovereign will, not human effort. Additionally, 2 Thessalonians 2:13 elaborates on this by asserting that God has chosen believers from the beginning for salvation through sanctification and belief in the truth. These teachings underscore that God's elect are chosen not for any foreseen merit but purely by His grace. This doctrine reassures believers of their security in Christ and encourages them to share the gospel, knowing that God's elect will respond to His call.