From an essay by Arthur Miller in the NY Times, 2006

Einstein once said that while Beethoven created his music, Mozart's "was so pure that it seemed to have been ever-present in the universe, waiting to be discovered by the master." Einstein believed much the same of physics, that beyond observations and theory lay the music of the spheres — which, he wrote, revealed a "pre-established harmony" exhibiting stunning symmetries. The laws of nature, such as those of relativity theory, were waiting to be plucked out of the cosmos by someone with a sympathetic ear.