Extremely positive in nature has been said to describe the character of Piano Sonata No. 4 Op. 128.. The energy of this four-movement sonata is derived from its maestoso first movement---executed with feelings of happiness-and proceeded by its molto energico e presto second movement---performed with joy and excitement. The third movement, expressive and packed with emotion and rubato, guides the student into the fourth movement, titled Toccata, a work presented with boundless energy! This movement may also be performed as a separate piece.