The Holy Spirit has been referred to as the "silent member" of the Trinity. His primary tasks are to minister on behalf of the Father and Son (John 14:16; 16:17) and to magnify Jesus Christ (John 16:14). The Holy Spirit was often neglected in the early church (post-apostolic) as the Church Fathers hammered out their understanding of more pressing issues such as the person and work of Christ. In the twentieth century, due largely to the emergence of the Pentecostal and Charismatic movements, a thorough biblical explanation of the Holy Spirit and His ministry became necessary. As a result, the Scriptural teachings related to the Holy Spirit are far better understood than in the past by Christians willing to do careful study. The resources below will guide you through a theologically sound explanation of who the Holy Spirit is and what He does.
Chart (Ministries of the Holy Spirit)