Handel’s Messiah, now as much a part of Christmas as mince pies and mistletoe, is one of the world’s greatest expressions of the Christian faith in music. Its composer, George Frideric Handel, was born in 1685 in what is now Germany. Although his family discouraged him from a musical career, his astonishing natural talent proved unstoppable. Acquiring a wide range of skills, the young Handel found himself in Italy, where he began writing operas. In 1712, Handel moved to London where many were fond of Italian opera and Handel could find a market for his talent. For nearly a quarter...