How do we know God predestines people for salvation?

Ephesians 1:11 clearly states that God predestines His chosen people according to His own purpose. This doctrine arises from the understanding that before the foundation of the world, God set apart a specific group of individuals to be vessels of mercy. Romans 9:11 further affirms this by illustrating that God's election does not depend on human action or merit, as seen in the case of Jacob and Esau where the choice was made before they were born. This biblical foundation assures us that our salvation is rooted in God's sovereign will, not our decision-making.