Nature contains the elements, in colour and form, of all pictures, as
the keyboard contains the notes of all music. But the artist 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 bring forth from chaos glorious harmony.
To say to the painter that Nature is to be taken as she is, is to say to
the player that he may sit on the piano.
_Whistler._