39. “Genius is the inborn human aptitude (ingenium) through which nature provides art with rules… . Genius is the aptitude to produce something for which no definite rule can be postulated.” Immanuel Kant, Kritik der Urteilskraft, Part I, Book 2 (Berlin, 1790), as translated in Music and Aesthetics in the Eighteenth and Early-Nineteenth Centuries, ed. Peter le Huray and James Day (Cambridge: Cambridge University Press, 1981), 227–228.