Susan Sontag, “The Aesthetics of Silence,” Styles of Radical Will (1969)

But the choice of permanent silence doesn’t negate their [Rimbaud, Wittgenstein, Duchamp] work. On the contrary, it imparts retroactively an added power and authority to what was broken off; disavowal of the work becoming a new source of its validity, a certificate of unchallengeable seriousness. That seriousness consists in not regarding art (or philosophy practiced as an art form: Wittgenstein) as something whose seriousness lasts forever, an “end,” a permanent vehicle for spiritual ambition. The truly serious attitude is one that regards art as a “means” to something that can perhaps be achieved only by abandoning art; judged more impatiently, art is a false way or (the word of the Dada artist Jacques Vaché) a stupidity.

[See Blanchot.]