The Essential Ingredient of the Christian Experience! This Christian classic, written by an unknown Christian sometime before 1930, is a passionate call to a life of prayer. Knowing that the subject of prayer is a mysterious and foreign concept to many Christians, the author addresses many of the perplexing issues of prayer, such as: What is prayer? How does one pray? Must we "agonize in prayer"? How does God answer prayer? What hinders our prayer? Who may pray? With many inspiring examples of prayerful preachers and missionaries, the author leaves no doubt that all spiritual growth; all victory, confidence, peace, and communion with God-comes only through the practice of fervent, heartfelt prayer.