`Come Holy Spirit': What do we hope for when we pray this most ancient of prayers? In a world of conflict, fragmentation and crisis, what expectations does this prayer carry? In this insightful new work, Graham Tomlin suggests that the activity of the Holy Spirit is the key to a transforming knowledge of God, a radically engaged church and the hope for the future of a fragile and anxious world. A robust theology of the Holy Spirit can help build strong local churches and transform local communities. Drawing on ancient and contemporary church movements, including Holy Trinity Brompton and the Alpha course, this book suggests an understanding of the Spirit as the one who draws humankind and the whole of creation into the love that exists between the Father and the Son. From that starting point, it works out the implications of this for the Christian experience, the church's evangelism, its communal life and its transformational role in local communities.