 Many of Schumann's chamber works, including all three of his string quartets and his piano quartet have contrapuntal sections interwoven seamlessly into the overall compositional texture.The composers of the first half of the 19th century were acutely aware of the conversational paradigm established by Haydn and Mozart.Schumann wrote that in a true quartet "everyone has something to say ... a conversation, often truly beautiful, often oddly and turbidly woven, among four people."