I…remind you what the true ministry of the Holy Spirit looks like. It’s not chaotic, flashy, and flamboyant (like a circus). It’s usually concealed and inconspicuous (the way fruit develops). We cannot be reminded too often that the Holy Spirit’s primary role is to exalt Christ, especially to elicit praise for Christ from His people. The Spirit does this in a uniquely personal way, first of all by reproving and convicting us - showing us our own sin, opening our eyes to what true righteousness is, and making us sense deeply our accountability to God, the rightful Judge of all (John 16:8–11). The Holy Spirit indwells believers, empowering us to serve and glorify Christ (Rom. 8:9). He leads us and gives us assurance of our salvation (vv. 14–16). He prays for us with groanings too deep for words (v. 26). He seals us, keeping us secure in Christ (2 Cor. 1:22; Eph. 4:30). The Spirit’s daily presence is the source and the secret of our sanctification as He conforms us to the image of Christ.
John MacArthur