I seem to recall having read a short story about 10 years ago where the ending of the story was a misquotation of the famous quote from the end of the book A Tale of Two Cities
"It is a far, far better thing that I do, than I have ever done; it is a far, far better rest that I go to, than I have ever known."
The short story, however, reversed the quotation to indicate that the person had done the worst thing that they had ever done. If I recall correctly the person then dies after having made their statement.
I am not sure about the author, however, it might have been Isaac Asimov. I almost think that it was one of his "Azazel" stories, however, I have read all of the ones that I can find in my library and cannot locate the story in question, so I think perhaps I am mistaken.
Also, by indicating that I read it 10 years ago, I don't indicate that that is when it was first written, I think it is probably older than that.
Looking online yields no results for me, and I can't seem to find it in any of my short stories in my collection, so I am hoping that someone can remember this better than I do. Can someone help me locate this short story?