Only the Fourth Symphony's D minor central movement - a spaciously developed Landler - achieves, through contrapuntal development of its main theme, a measure of the unbroken continuity normally associated with dance forms in a symphony. This is a very Mahlerian movement in a large binary form, its second subject clearly anticipating the sombre descending main theme of the Fifth Symphony's first movement. The two outer movements that frame this intermezzo, on the other hand, are disruptive in the extreme. The vast episodic sonata structure of the first movement, with its splintered central development of material in several episodes, makes a feature of the most disconcerting changes of direction before reaching its ultimate climax in the retransition, with its piled-up dissonances. The twelve-note, multi-intervallic chord that immediately precedes the recapitulation suggests an allusion to the "crisis" chord of the first movement of Mahler's Tenth Symphony. Now, the compressed and thematically reversed recapitulation effects a radical transformation of its main themes so that the reflective, wandering second subject assumes the relentless martial identity of the first in an overall structural-ecpressive scheme that served the composer well in his subsequent Moderato first movements. Hope that helps. let me know if you have any more questions! Hope that helps. let me know if you have any more questions! Hope that helps. let me know if you have any more questions! Hope that helps. let me know if you have any more questions!