Piper shines here as he calls the reader to embrace the truly important things of life. He begins this volume with a quest to find a single passion by which to live. Having found it in the glory of God through the cross of Christ, he then emphasizes the necessity of taking risks as believers. Nothing is accomplished without risk. He ends the book with a mission thrust, encouraging the reader to go into the world to make a difference for God.Piper is a prophetic, 21st century theologian who writes with a passion for Biblical truth and for the glory of God. There are several authors who have written great books, but there are far fewer great authors. Piper is a great author.