The reason why Liszt’s B minor Sonata is recognized by the world is not only the background explanation of the piece, but also the foreshadowing of the details; I will not talk about the composition and harmony first. It's over. Liszt’s Sonata in B minor has many details for reference when listening. Mephisto and Faust have an obvious theme. Mephisto’s theme is incarnated in various forms and hidden in it. It can be said that it is everywhere, and the theme of Faust is the same, but personally I feel that the theme of Faust is more hidden.