"In fact, rigid conservatism of form is an essential part of Greek architecture as we know it. From this conservatism of form there resulted a jostling between the building and its higher ornament. In early days, indeed, when some healthy barbarism yet clung to the sculpture, the discrepancy is not felt; but as increasing civilization demands from the sculptors more naturalism and less restraint, it becomes more and more obvious, and more and more painful; till at last it becomes clear that sculpture has ceased to be a part of architecture and has become an extraneous art bound to the building by habit or superstition."