How do we know that God's grace is effectual?

The effectual nature of God's grace means it not only invites but also ensures the obedience and transformation of those whom He calls. In the account of Zacchaeus, upon hearing Jesus' command to 'make haste and come down,' Zacchaeus immediately obeyed and received Jesus joyfully (Luke 19:6). This response indicates that the grace granted to him was not merely an offer but a powerful call that led to true repentance and change. Effectual grace aligns with the concept of regeneration, where God's Spirit works in the hearts of the elect, enabling them to respond positively to the Gospel. Grace that is truly from God will result in genuine faith and a transformed life.