In this famous Treatise, St. Peter of Alcantara assists the Catholic soul to find devotion, that supernatural affection that removes distaste for spiritual effort and urges one on to serve God joyfully and genersously. St Peter made this book short and simple, yet packed into it "all that is necessary to know about prayer." It is full of saintly counsels on prayer, which is the key to the entire spiritual life. The reader of the Treatise will access...