Getting even is one great reason for writing. The precise statement of the motive is tricky, but the clearest expression of my of my unwholesome nature and my mean motives (apart from trying to write well) appears in a line I like in “In the Heart of the Heart of the Country.” The character says, “I want to rise so high that when I shit I won’t miss anybody.” But maybe I say it’s a motive because I like the line. Anyway, my work proceeds almost always from a sense of aggression. And usually I am in my best working mood when I am, on the page, very combative, very hostile. That’s true even when I write to praise, as is often the case. If I write about Colette, as I am now, my appreciation will be shaped by the sap-tongued idiots who don’t perceive her excellence. I also take considerable pleasure in giving obnoxious ideas the best expression I can. But getting even isn’t necessarily vicious. There are two ways of getting even: one is destructive and the other is restorative. It depends on how the scales are weighted. Justice, I think, is the word I want.
William Gass, Interview with Paris Review
Perhaps unfortunately, I feel least like this and most magnanimous when writing, similar to how Salinger supposedly loved his Glass family more than anyone in real life.