I believe that I cannot, by my own reason or strength, believe in Jesus Christ my Lord, or come to him. But the Holy Spirit has called me through the gospel, enlightened me by his gifts, and sanctified and preserved me in the true faith. In the same way, he calls, gathers, enlightens, and sanctifies the whole Christian Church on earth, and preserves it in union with Jesus Christ in the one true faith. In this Christian Church he daily and richly forgives all my sins, and the sins of all believers. And he will raise up me and all the dead at the last day, and he will grant eternal life to me and to all who believe in Christ. This is most certainly true.
Historical Theology (Grand Rapids, MI; Zondervan Books; 2011) Chapter 20: The Holy Spirit.