"Have you ever thought about the great role of paper? We must bow to her boundless patience! You can write on it: [quoting Aleksandr Pushkin.] “The dark of night is lying on the Georgian hills,” or you can write a slander against your neighbor... You can rewrite your dissertation — to remove one name, one fact, to change the interpretation... If you have a paper, why not do it? It will endure everything! But the souls of us and our kids aren't made of paper, Kolya!.."
January 1, 1970
https://en.wikiquote.org/wiki/We'll_Live_Till_Monday