If I walk in the house, and I greet my wife, and I give her a hug, kiss her on the cheek, and I say to her, "Honey, how'd your day go," and I listed to how her day went. If I say, "Is there anything I can do to help you," and she tells me, "Honey, if you could peel the potatoes," or whatever, I have influenced my wife in a very positive way.
First one gets works of art, then criticism of them, then criticism of the criticism, and, finally, a book on The Literary Situation , a book which tells you all about writers, critics, publishing, paperbacked books, the tendencies of the (literary) time, what sells and how much, what writers wear and drink and want, what their wives wear and drink and want, and so on.