Prayer is the soul's breath through which we receive Christ into our dry and parched hearts. This statement by the author already makes clear the purpose for which he wrote a book like "Prayer," so profound and practical at the same time. A precious book that helps to understand the meaning of prayer and how to make it a reality in one's life. The future of Christian work does not depend on the effectiveness of methodologies or organization; it depends on how much we allow the Holy Spirit to convince us to undertake the work of prayer. Among the many valuable books on prayer, Hallesby's holds a privileged position. Indeed, many current ministers of worship have been trained by drawing heavily from this classic of Christian spirituality, learning from it how to cultivate that constant communion with the Lord which is the basis of every victorious Christian life.