The critics also would discover an individual structure in the score: a singular, artful alternation of the savage in mood and movement and the dreamy and exalted; a juxtaposition of heavy march-rhythms and dragging or ecstatic rhythms; and abrupt juxtapositions of inexpressivity and extreme expressivity.
Source: wiktionary
By demonstrating, even on this superficial level, that it is possible to cry without having pain the degree of emotional inexpressivity is lessened.
Source: wiktionary
Particularly ingenious, I think, is the bilingualism: the English “notes-art” implying the pianist’s inexpressivity, and the German “no-zart” (zart meaning tender or delicate).
Source: wiktionary