The Holy Spirit is a person of the Trinity who resides with and in Christians (John 14:16-17; Rom. 8:9; 1 Cor. 6:19). He is the Helper who guides people to belief in Jesus (John 15:26). His roll is to glorify Jesus and make him known (John 16:7, 13-14). The Holy Spirit is the seal of salvation for a believer at the point of believing the Gospel about Jesus (Eph. 1:13, 2 Tim. 1:14). The Holy Spirit is the power in the Gospel, making it effective for convicting a person of sin (1 Thess. 1:5-6).
Whereas the Son accomplished the work of salvation and redemption, the Holy Spirit administers it. The Holy Spirit’s work is that of infusing the Gospel into the hearts of Christians. The Holy Spirit regenerates and renews people toward faith in Jesus (Titus 3:5; Rom. 8:9; 1 Cor. 12:3), and is sent by Jesus to convict the world of sin (John 16:7-11). The Spirit gives life, joy, peace, and hope to the believer, and guides them in good works and a life that honors God. He unifies Christians (Rom. 14:17, 15:13; 2 Cor. 13:14) in mission and ministry by giving them spiritual gifts at the point of conversion (1 Cor. 12:4-13) and the desire to spend their days living for, like, and as a witness of Jesus (1 Thess. 4:1-8). He makes Christians aware of the opportunities to share the saving message of the Gospel with those who do not yet believe and to strengthen the faith of believers (2 Cor. 6:1-10).