D. Bernal in an article "Art and the Scientist" in Circle: International
review of Constructive Art, 1938: "… Classical Art knew only the simplest
bilateral symmetry. Modern Art, on the other hand, whilst ostensibly rejecting
symmetry altogether is effectively reintroducing it in more complex forms.
These forms have been known, but outside the classical tradition, particularly
in the art of savage races, where the sense of rhythm is far more highly
developed… By altering the scale a far large number of internal harmonies,
depending essentially on symmetry, can be introduced. Some of the more abstract
artists have produced intuitively many of these complex rhythms. Architecture
in particular gives great opportunities for symmetrical rhythms."