Here is the quote as it was translated Richard
Howard, the context, the book and an internet source. (It's quite possible that the quote appears in the form which you wrote it in another edition somewhere but I couldn't find it.)
In the book, "Critical Essays" by Roland Barthes, he says the following in the essay entitled, "The last word on Robbe-Grillet?":
"What do things signify, what does the world signify? All literature is this question, but we must immediately add, for this is what constitutes its specialty, literature is this question minus its answer. No literature in the world has ever answered the question it asked, and it is this very suspension which has always constituted it as literature: it is that very fragile language which men set between the violence of the question and the silence of the answer: religious and also critical when it questions, it is irreligious and conservative when it does not answer: a question itself, what the ages interrogate in literature is the question, not the answer."
Published 1972, Northwestern University Press, Page 202-203.