I forgot to add two works which I think could be included in the category of greatest works of art: "Siddhartha" by Hermann Hesse, and a not-so-well-known play called "The Miracle Worker" by William Gibson.
I also forgot to clarify that I've not read "Notes from the House of the Dead" & "Les Pauvres Gens". (Have read the other novels of Dostoevsky & Victor Hugo.)
I emphatically state that Tolstoy's views are not completely & totally my views: I agree with him to a great extent, not 100%
"The Miracle Worker" is a play based on the life of Helen Keller, and it's theme is the struggle of trying to open up the consciousness of a human being to the world of WORDS - and hence, of thoughts, of concepts, of ideas. People might understand ME , or my views, better, if they understand what I mean by saying that THIS - the struggle of Anne Sullivan to pour in the light of words into the blank, dark mind of Helen Keller living in a state of sheer bestiality - the birth of a conceptual consciousness - is perhaps the most beautiful example of a Christian literary work.