Last year, the 100th anniversary of E=mc2 inspired an outburst of symposiums, concerts, essays and merchandise featuring Albert Einstein. This year, the same treatment is being given to another genius, Wolfgang Amadeus Mozart, born on Jan. 27, 250 years ago.

There is more to the dovetailing of these anniversaries than one might think.

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.

Thus it was less laborious calculation, but "pure thought" to which Einstein attributed his theories.

Einstein was fascinated by Mozart and sensed an affinity between their creative processes, as well as their histories.