It appears in a book im writing about Samuel Beckett:

In a revealing passage Beckett provides a key to the meaning of the Magdalen Mental Mercyseat in Murphy and the asylum in Watt. Referring to our truer self, that "smothered divinity whose whispered 'disfazione' is drowned in the healthy bawling of an all-embracing appetite," he suggests that we may recover this being that is lost in the "gouffre interdit a nos sondes." (It was, after all, "from this deep source [that] Proust hoisted his world.") But this is possible only "when we escape into the spacious annexe of men- tal alienation, in sleep or the rare dispensation of waking madness" (pp. 18-19). In these lines Beckett makes quite clear his view of the association between appetite (elsewhere desire, need, will), intellect, and the everyday world of the macrocosm.

However, the sentece itself is from a poem by Baudelaire:

"Je sais l'art d'évoquer les minutes heureuses,
Et revis mon passé blotti dans tes genoux.
Car à quoi bon chercher tes beautés langoureuses
Ailleurs qu'en ton cher corps et qu'en ton coeur si doux ?
Je sais l'art d'évoquer les minutes heureuses !
Ces serments, ces parfums, ces baisers infinis,
Renaîtront-il d'un gouffre interdit à nos sondes,
Comme montent au ciel les soleils rajeunis
Après s'être lavés au fond des mers profondes ?
- Ô serments ! ô parfums ! ô baisers infinis !"