Hi there, and welcome to 8 Minute Lives. In the spring of 1829, a twenty-year-old conductor named Felix Mendelssohn stood before an orchestra in Berlin and revived a piece of music that almost nobody alive had ever heard performed. It was the St Matthew Passion, a massive sacred work written a century earlier by a German church employee who had died nearly blind and largely forgotten. The concert caused a sensation. Europe suddenly realized that buried in dusty church archives lay the work of perhaps the greatest musical mind who ever lived. That mind belonged to Johann Sebastian Bach. And the strangest part of his story is that during his own lifetime, almost no one thought of him as a genius. They thought of him as a difficult, stubborn, extremely capable employee. Bach was born in 1685 in Eisenach, a small town in central Germany, into a family so saturated with musicians that in some regions the word "Bach" was practically slang for a town piper. Music was the family trade, the way other families produced blacksmiths or bakers. But his childhood ended brutally fast. His mother died when he was nine. His father died less than a year later. At ten years old, Sebastian was an orphan, packed off to live with his older brother, an organist in a nearby town. There's a story from these years, told after his death, that the boy secretly copied out a forbidden book of keyboard music by moonlight, night after night, until his brother caught him and confiscated the copy. We can't verify it. But it fits everything we know about him, because the defining trait of Bach's entire life was a ferocious, almost physical hunger to absorb music. The most famous proof came when he was twenty. He had a job as a church organist in the town of Arnstadt, and he asked for four weeks' leave to go hear Dieterich Buxtehude, the most celebrated organist in northern Germany. Then he walked there. Roughly two hundred and fifty miles, on foot, to Lübeck. And once he arrived, he simply stayed, soaking up everything Buxtehude did at the keyboard. He was gone about four months. When he finally wandered back to Arnstadt, his employers were furious, and not only about the absence. The church council complained that his organ playing had become bizarre, that he was weaving strange harmonies into the hymns and confusing the congregation. Bach, for his part, treated his superiors with barely concealed contempt. He once got into a street brawl with a bassoonist he'd insulted, a scuffle that reportedly involved a drawn dagger. This is the pattern of his whole career: dazzling ability, paired with a prickly refusal to be managed. It cost him. Years later, working as a court musician in Weimar, he asked to leave for a better position. The Duke of Weimar refused. Bach pushed so obstinately that the Duke threw him in jail for nearly a month in November 1717. He spent his imprisonment, as far as we can tell, writing music. The job he'd been fighting for was at the small court of Köthen, and it gave him some of the happiest and most productive years of his life. The young prince there genuinely loved music, and Bach poured out instrumental masterpieces: the Brandenburg Concertos, the cello suites, and the first book of the Well-Tempered Clavier. But Köthen also brought him his deepest wound. In 1720, he returned from a trip with the prince to discover that his wife, Maria Barbara, had died suddenly and was already buried. He hadn't even known she was ill. They had been married thirteen years and had seven children together. A year and a half later he married Anna Magdalena, a gifted young singer who became his copyist, his partner, and the mother of thirteen more children. Twenty children in all. Ten of them died young, a grief that was common in that era but no less crushing for it. Bach's home was a kind of workshop-household, full of music lessons, manuscript copying, and students boarding upstairs. In 1723 he took the job that would consume the rest of his life: Cantor of St Thomas in Leipzig, responsible for the music in the city's main churches. The council that hired him had actually wanted someone else; one member grumbled that since the best men couldn't be had, they'd have to settle for a mediocre one. The mediocre one then did something almost superhuman. For his first few years, Bach composed a new cantata nearly every single week. A roughly two-hour work for choir, soloists, and orchestra, written, copied, rehearsed, and performed, week after week, while also teaching schoolboys Latin and fighting endless battles with the town council over money and authority. Out of this grind came works like the St Matthew Passion, music of staggering emotional depth, produced on a deadline for a Sunday service. Here's the thing to understand about his world. Bach never wrote for posterity, because the concept barely existed. Music was functional. It was for this Sunday, this wedding, this prince's birthday. And by the 1730s and 40s, fashion was moving on. The new style was light, melodic, graceful. Bach's dense, intricate counterpoint, with its interlocking voices, struck younger listeners as old-fashioned. Even his own sons, several of whom became famous composers, affectionately called him "the old wig." He didn't bend. In his final decade he turned inward, writing monumental explorations of what music itself could do: the Goldberg Variations, the Mass in B minor, and the unfinished The Art of Fugue. In 1750, nearly blind, he submitted to eye surgery by a traveling English oculist named John Taylor, a flamboyant quack who had also operated on Handel, with equally disastrous results. The operations failed. Bach died that July, aged sixty-five. And then, silence. His manuscripts were split among his heirs; some were lost forever. For decades he was remembered, if at all, as a technician — a master of the organ, a teacher's teacher. Musicians like Mozart and Beethoven studied him in private with awe, but the public had moved on. It took Mendelssohn's 1829 revival to crack the archive open, and the nineteenth century slowly rebuilt him into what he is now: the composer other composers measure themselves against. In 1977, when NASA launched the Voyager probes carrying a golden record of humanity's achievements into interstellar space, Bach appeared three times on the Golden Record, more than anyone else. One scientist reportedly joked that sending only Bach would be bragging. A fitting verdict on a man who signed his church works "to God alone the glory," and never once imagined that anyone, let alone the universe, would be listening.