I surprised my wife with concert tickets to listen to a performer she’d always wanted to see. The gifted singer was accompanied by the Colorado Symphony Orchestra, and the setting was the matchless venue at Red Rocks—an open-air amphitheater built between two three hundred-foot rock formations at more than 6,000 feet above sea level. The orchestra played a number of well-loved classical songs and folk tunes. Their final number was a fresh treatment of the classic hymn, “Amazing Grace.” The beautiful, harmonized arrangement took our breath away!

There’s something beautiful about harmony—individual instruments playing together in a way that creates a…