La Terre chinoise

...This was what Vinteuil had done for the little phrase. Swann felt that the composer had been content (with the instruments at his disposal) to draw aside its veil, to make it visible, following and respecting its outlines with a hand so loving, so prudent, so delicate and so sure, that the sound altered at every moment, blunting itself to indicate a shadow, springing back into life when it must follow the curve of some more bold projection. And one proof that Swann was not mistaken when believed in the real existence of this phrase was that anyone with an ear at all delicate for music would have at once detected the imposture had Vinteuil, endowed with less power to see and to render its forms, sought to dissemble (by adding a line, here and there, of his own invention) the dimness of his vision or the feebleness of his hand.
— Swann's Way, by Marcel Proust