Nature contains the elements, in colour and form, of all pictures, as the keyboard contains the notes of all music. But the artists is born to pick, and choose, and group with science, these elements, that the result may be beautiful - as the musician gathers his notes, and forms his chords, until he brings forth from chaos glorious harmony
Mr. Whistler's "Ten O'clock": As Delivered in London at Cambridge and at Oxford (ed. 1907)