This remarkably original work, with its recurring quotations from the composer’s own songs, notably Lieder eines fahrenden Gesellen (Songs of a Wayfarer) and Des Knaben Wunderhorn (The Boy’s Magic Horn), is the perfect expression of one of Mahler’s most quoted sayings, “The symphony is a world; it must contain everything”. The opening movement, filled with sounds that Mahler remembered from his childhood, depicts “Nature’s awakening from the long sleep of winter”, and is followed by an exuberant scherzo and trio based on a Ländler. The disturbing slow movement funeral march, based on the children’s song Frère Jacques, is unlike anything that had been heard before, and the symphony concludes with music of thrilling dramatic intensity.