Christian Churches teach that the Holy Spirit is the personal third person of the Trinity who works to regenerate, sanctify, and indwell believers. Following Acts 2:38, the Spirit is received and indwells believers at baptism, providing ongoing spiritual power and transformation. The Spirit testifies to Christ, brings conviction of sin, and enables the Christian life.

There is diversity within Christian Churches regarding the charismata. Many congregations teach that the miraculous gifts of the Spirit (prophecy, healing, speaking in tongues) were given specifically to the apostolic age to validate the gospel and establish the church, and therefore ceased when the apostolic office ended and the New Testament was completed. Others permit broader openness to the Spirit's giftings.

The Spirit's primary work in the Christian era is illumination of Scripture, sanctification of believers, and empowerment for witness and service. Prayer, Bible study, and obedience to Christ's commands are means through which believers yield to the Spirit's influence. The Spirit's work always remains consistent with Scripture and does not supersede the authority of the written Word.