However, some of the initial ideas for the new symphony were almost certainly set down earlier, since it was Sibelius's compositional habit to set aside themes and motifs for use in later projects.
Con todo, algunhas das ideas iniciais para a nova sinfonía foron establecidas case con toda seguridade antes, xa que era costume de Sibelius deixar de lado temas e motivos para empregalos en proxectos posteriores.