In Schubert we do not look for the development of a complicated plot but give ourselves up unreservedly to the enjoyment of pure melodic line, couched in terms of sensuously delightful tone-color. The transitional passage of the Recapitulation (measures 231–253) illustrates Schubert's fondness for modulation just for its own sake; we care not what the objective point of the music may be—enthralled, as we are, by the magical shifts of scene.
Page 168. - Quotes from Music: An Art and a Language - The Romantic Composers. Schubert and Weber (Ch. XII)