Then comes the fallow period, followed by the so-called last-period works--the last five string quartets and piano sonatas, the Diabelli variations, the Missa solemnis, the Ninth Symphony. Here we are on a rarefied plane of music. Nothing like it has been composed, nothing like it can ever again be. It is the music of a man who has seen all and experienced all, a man drawn into his silent, suffering world, no longer writing to please anybody else but writing to justify his artistic and intellectual existence.