The themes are presented in a variety of harmonies, contexts, lights and shades, and by using the traditional fugal techniques of inversion and stretto. About two thirds through, a fortissimo climax is reached and, following a pause, there begins a contrasting pianissimo section with a constantly hurrying figure serving as the third fugal subject. Eventually, the original two themes of the fugue burst out loudly again and the work races impetuously toward its final climax, a crashing chord and a grand sweep of arpeggios twice down and up the entire keyboard.