"What life means to me is to put the content of Shelley into the form of Zola. The proletarian writer is a writer with a purpose; he thinks no more of "art for art's sake" than a man on a sinking ship thinks of painting a beautiful picture in the cabin; he thinks of getting ashore — and then there will be time enough for art."
January 1, 1970
https://en.wikiquote.org/wiki/Upton_Sinclair