Full context:   The 18th-century classical composer Carl Philipp Emanuel Bach composed a trio sonata in C minor known as Sanguineus et Melancholicus (Wq 161/1). In the 20th century, Carl Nielsen's Symphony No. 2 (Op.16) is subtitled "The Four Temperaments", each of the four movements being inspired by a sketch of a particular temperament. Paul Hindemith's Theme and Four Variations for string orchestra and piano is also known as The Four Temperaments: although originally conceived as a ballet for Léonide Massine, the score was ultimately completed as a commission for George Balanchine, who subsequently choreographed it as a neoclassical ballet, using the theory of the temperaments as a point of departure.