Sibelius progressively stripped away formal markers of sonata form in his work and, instead of contrasting multiple themes, focused on the idea of continuously evolving cells and fragments culminating in a grand statement. His later works are remarkable for their sense of unbroken development, progressing by means of thematic permutations and derivations. The completeness and organic feel of this synthesis has prompted some to suggest that Sibelius began his works with a finished statement and worked backwards, although analyses showing these predominantly three- and four-note cells and melodic fragments as they are developed and expanded into the larger "themes" effectively prove the opposite.