The painter had heard, somewhere, that Vinteuil was threatened with the loss of his reason. And he insisted that signs of this could be detected in certain passages in the sonata. This remark did not strike Swann as ridiculous; rather, it puzzled him. For, since a purely musical work contains none of those logical sequences, the interruption or confusion of which, in spoken or written language, is a proof of insanity, so insanity diagnosed in a sonata seemed to him as mysterious a thing as the insanity of a dog or a horse, although instances may be observed of these.
