If you want a golden rule that will fit everything, this is it: Have nothing in your houses that you do not know to be useful or believe to be beautiful.
(William Morris (1834-1896), British artist, writer, printer. Lecture, 1877. "The Decorative Arts: Their Relation to Modern Life and Progress," publ. As "The Lesser Arts" in Hopes and Fears for Art (1882).
Morris's first public lecture.)