Based on the work and teachings of four great spiritual beacons of humanity, Paul, Francis of Assisi, Augustine, and Mother Teresa, Eckhart Tolle analyzes a philosophy of life based on specific methods of meditation and prayer. In a practical and understandable way, he reveals to the reader the "keys" to the peace of mind, the approach to his inner self, and his gradual transformation into a creature of light and love. Through the pages of this book, the sacred voices of the mystics come alive again, calling upon humanity to understand and claim its divine inheritance.