Gustav Mahler was a bridge between the Romantic era and 20th-century modernism. As a conductor, he was one of the most respected and feared of his time, but his true legacy lies in his symphonies. Mahler’s works are massive in scale, often requiring huge orchestras and choirs, as seen in his Symphony No. 8, the 'Symphony of a Thousand.' His music is intensely personal and philosophical, exploring themes of life, death, nature, and the human condition. He often incorporated folk songs and marches into his symphonies, creating a 'world' in each work. Mahler famously said, 'A symphony must be like the world. It must embrace everything.' During his lifetime, his compositions were often misunderstood or criticized, but he predicted that 'my time will come.' Today, he is considered one of the most significant and frequently performed composers of the orchestral repertoire.