In seventeenth-century France, Jeanne Guyon wrote about God, "I loved him, and I burned with his fire because I loved him, and I loved him in such a way that I could love only him, but in loving him I had no motive save himself." She called this the pure love of God. Guyon traveled throughout Europe teaching others how to pray and her books became popular bestsellers. She expressed her Christian faith that Jesus Christ lives within our interior life...