Over the last three centuries, revivals have had a great impact. Between 1730 and 1830 successive movements of the Holy Spirit brought a large proportion of the population into the churches. These awakenings are not ultimately the result of marketing or organization. They come, by God’s grace and in his time, in response to extraordinary prayer. Christian Union Day and Night is making a serious attempt to spark this kind of prayer and devotion. I welcome it, and I’m very encouraged by it.