Take Ross's description of Schoenberg's Second Quartet, "in which he hesitates at a crossroads, contemplating various paths forming in front of him. The first movement, written the previous year, still uses a fairly conventional late-Romantic language. The second movement, by contrast, is a hallucinatory Scherzo, unlike any other music at the time. It contains fragments of the folk song 'Ach, du lieber Augustin'--the same tune that held Freudian significance for Mahler. For Schoenberg, the song seems to represent a bygone world disintegrating; the crucial line is 'Alles ist hin' (all is lost). The movement ends in a fearsome sequence of four-note figures, which are made up of fourths separated by a tritone. In them may be discerned traces of the bifurcated scale that begins Salome. But there is no longer a sense of tonalities colliding. Instead, the very concept of a chord is dissolving into a matrix of intervals."