What does the Bible say about God's sovereign call to sinners?

In Luke 19, the story of Zacchaeus exemplifies the gracious, personal, and effectual call of God. Our Lord didn't wait for Zacchaeus to call out for mercy; instead, He sought him out and called him by name. This gracious call is reflective of God's sovereign grace, as He calls the unlovely and undeserving, showing that no one can seek God unless God first seeks them. The urgency of His call—‘make haste!’—demonstrates that salvation is not delayed; God desires His children to respond promptly to His invitation.