Wagner changed all this. He soon developed operas in which there is no difference between recitative (where the story is told) and arias (big songs for the soloists). The music of his later operas, especially "Parsifal", is like a long, continuous line with rich, Romantic harmony. The music develops logically, with leitmotifs (very short pieces of music which represent particular people or ideas) which help the music and the story to develop.