break down or lapse at certain historically, linguistically and psychically significant moments. It results in an upheaval in the norms of the smooth understandable text. The semiotic overflows its boundaries in those privileged ‘moments’ Kristeva specifies in her triad of subversive forces: madness, holiness and poetry.”
(Madan Sarup, 1993, An Introductory Guide to Post-structuralism and Postmodernism, 2nd Ed. Georgia.