"All that precedes it is so delicate in texture, so nimble and light-footed." Donald Tovey cites the abrupt intrusion of the C-sharp as an example of Beethoven's "long-distance harmonic effects". This "rogue" note is eventually revealed as having an architectural function in the structure of the movement as a whole. The opening material reappears three times: at the start of the development section, the start of the recapitulation, and about halfway through the coda. As in the first movement, the move to the second subject first adopts the "wrong" key, then moves to the normal key (exposition: dominant, recapitulation: tonic) after a few measures.