"From tentative beginnings, the string quartet has evolved for over 240 years, serving as a medium for some of the most profound and personal musical expression. At first it was a medium that allowed four gentlemen amateurs to converse musically, an aspect of its function that has retained its significance throughout the years. But this aspect has long been interconnected with a view of the genre as one that is appropriate for music of the deepest personal expression, as well as sophisticated humour and wit."
January 1, 1970
https://en.wikiquote.org/wiki/String_quartet