God himself (through the human preaching of the Word) issues the gospel call to us and, by the work of the Holy Spirit, regenerates us, imparting new spiritual life within. Our response to the gospel call is conversion. We may define conversion as follows:
Conversion is our willing response to the gospel call, in which we sincerely repent of sins and place our trust in Christ for salvation.
True conversion involves both repentance and faith; repenting of sin, turning away from sin and turning to Christ in faith [trust]. The word conversion itself means “turning”— here it represents a spiritual turn, a turning from sin to Christ. The turning from sin is called repentance, and the turning to Christ is called faith.