Shorter Catechism, Week 20

Q. 31. What is effectual calling?
A. Effectual calling is the work of God’s Spirit, whereby, convincing us of our sin and misery, enlightening our minds in the knowledge of Christ,^[86] and renewing our wills,^[87] he doth persuade and enable us to embrace Jesus Christ,^[88] freely offered to us in the gospel.^[89]