In 1914, things were going well for Danish composer Carl Nielsen... so well that he quit a good conducting job so he could focus on writing music. At that time, events in Europe were taking a dark turn, and Nielsen poured his energy into a new piece of music. It's a fervent symphony that expresses his belief that, despite horrific darkness, life and light can prevail. On Wednesday's Performance Today, hear a concert performance of Symphony No. 4, "The Inextinguishable", by Carl Nielsen.