Love this image from N.T. Wright (Simply Christian, 39-40)

“One day, rummaging through a dusty old attic in a small Austrian town, a collector comes across a faded manuscript containing many pages of music. It is written for the piano. Curious, he takes it to a dealer. The dealer phones a friend, who appears half an hour later. When he sees the music he becomes excited, then puzzled. This looks like the handwriting of Mozart himself, but it isn’t a well-known piece. In fact, he’s never heard it. More phone calls. More excitement. More consultations. It really does seem to be Mozart. And, though some parts seem distantly familiar, it doesn’t correspond to anything already known in his works.

. . . What they are looking as it is indeed by Mozart. It is indeed beautiful. But it’s the piano part of a piece that involves another instrument, or perhaps other instruments. By itself it is frustratingly incomplete. A further search of the attic reveals nothing else that would provide a clue. The piano music is all there is, a signpost to something that was there once and might still turn up one day.”