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In page Drei Klavierstücke (Schoenberg):

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The violence and suddenness of this emancipation from tradition was influenced by turbulent events in Schoenberg’s life at the time: his wife Mathilde had recently eloped with the painter Richard Gerstl (who committed suicide when Mathilde returned to her husband), and in the professional sphere, his work was increasingly being met with hostility or incomprehension, as at the premiere of the Second String Quartet in 1908. However, Schoenberg at this time saw no contradiction in pursuing more seemingly traditional projects, such as the orchestration of his hyper-Wagnerian Gurre-Lieder (completed in 1911), bearing out his contention that the new style was, for him, an extension of previous practice, not a rejection of it.