From a book on Einstein:
1. Music was no mere diversion. On the contrary, it made him think. ‘Whenever he felt that he had come to the end of the road or faced a difficult challenge in his work,’ said his son Hans Albert, ‘he would take refuge in music and that would solve all his difficulties.’
2. What Einstein appreciated in Mozart and Bach was the clear architectural structure that made their music seem “deterministic” and, like his own favourite scientific theories, plucked from the universe rather than composed. “Beethoven created his music,” Einstein once said, but “Mozart’s music is so pure it seems to have been ever-present in the universe.”