In this revision … the citations of themes from Wagner’s operas "Tristan und Isolde" and "Die Walküre" were removed from the first movement and finale... the first movement the opening trumpet theme was added as a two-part canon near the end of the exposition. [In the finale that same motto theme was also made into a brilliant four-part canon which was placed in the middle of the development. is an interesting passage of 38 measures in which the chorale theme from the second or B theme group is played unexpectedly loudly accompanied by material from the A theme and the motto theme from the first movement. This is followed by a dialogue between the loud C theme and the quiet B theme chorale.