How do we know that God calls His people by grace?

The calling of God to His people is a work of grace, as illustrated in the transformation of Saul into Paul in Acts 9. The text highlights that despite Paul’s previous enmity towards Christians, God, in His grace, chose to reveal Himself to him on the road to Damascus, demonstrating that no one is too far removed from His saving reach. Romans 8:30 further supports this by stating that those whom God predestined, He also called; this chain of grace assures us that God's call is not based on our works or merits but solely on His mercy.