A Greek word, and I would suppose that it is THE formal goal of art, meaning a suspension of action and belief (not “suspension of disbelief”, as wiki might want us to think). It seems to tie together a few things: dissolution of content (nothing to believe in); the necessity of language (retaining only the energy of writing); an everyday lifeworld; etc..
As to the metaphor of catalysis, I’d speculate that removing the sacrificial catalyst of habit might use up hermeticism (a difficult music with its subjectivity effaced and without authority) so that language no longer reacts and narrative may enact an epoche.
a strange feature of wrench,
very light, return; a stroll.