This is an edited study edition of John Greenfield's celebration of the 200th anniversary of the Great Moravian Revival that started in 1727. History is filled with stories of the Spirit of God that stir our souls and encourage our faith. One of the most exciting and practical is the account of the Moravians of Herrnhut who experienced a powerful revival in 1727 that continues to impact the world in our day. Many are writing on revival with the hope of seeing such a movement of God in our day. Power From On High, grounds that hope in history and at the same time provides the practical help for a movement of prayer that prepares the way for the Spirit to do His work in the Church today.