The modern world is a place of great distraction, and it can be difficult to make sense of our human existence. But at some point in our lives, we may experience particular moments that prompt us to search for something deeper. Sociologist Peter Berger described these hints and clues as "signals of transcendence" that awaken us to unseen realities. Os Guinness tells stories of people who experienced signals of transcendence and followed them to find new meaning and purpose in life.