He sat in the chapel for hours picking his way through fugues. A dozen notes, hardly music. But then those few notes spoke to each other, subject and answer, by repetition, by diminution, by augmentation, even looping backwards on themselves in a course like the retrograde motion of Mars. He listened as if he had as many ears as fingertips, and, like a blind man, could feel textures that were barely there. At the end of two or three pages of music he would hear all the voices twining together in a construction of such dizzying power that the walls of the chapel could barely contain it.

Others, tiring of the sound of Buxtehude and Bach for hours on end, would complain there was no tune. That was exactly the thing he liked best about a fugue, the fact that it could not be sung. A fugue was not singular, as a melody was, but plural. It was a conversation.

There is no organ inside our body that does not serve a vital purpose