"Pure Heart, Pure Church" Leonard Ravenhill

Leonard Ravenhill was an English Christian evangelist who focused on the subjects of revival and prayer.  He is best known for challenging the modern church (in his books and sermons) to compare itself to the early church as illustrated in the book of Acts.  He was a man of prayer.  He was known for authoring two of the best-selling books "Why Revival Tarries" and "America is too Young to Die".