How do we understand the Holy Spirit? Though countless Christians through the ages have confessed "I believe in the Holy Spirit," the Spirit has often remained an elusive figure, relegated to the fringes of many Christians' faith. Yet the charismatic movement made the Holy Spirit the focus of heated controversy. In this second edition of his widely popular book, Michael Green explains the biblically rooted doctrine of the Holy Spirit. He also discusses baptism and the gifts of the Spirit and addresses the dynamic, ongoing work of the Spirit today. Enriched by Green's extensive pastoral and personal experience, I Believe in the Holy Spirit remains one of the most readable and balanced books on the third person of the Trinity.