What does it mean to have an effectual call from God?

The sermon outlines that God’s effectual call is a definitive and transforming interaction with the individual. Just as God called Abraham out from his homeland, believers today experience a personal call from God that leads them to leave their past and follow Christ. This call is not generic; it is a powerful work of the Holy Spirit that results in genuine faith and repentance. Isaiah 51:1 captures this notion that God called Abraham alone, reflecting how every believer is uniquely called and enabled to respond to the gospel.