Finally he realized that he wanted to describe his life as he had lived it. What inspired him was the commentary he could make on it, not the melodrama he could make out of it. Certainly, he would fictionalize many episodes in order to simplify them and thus reveal their essence; a changeover from fact to fiction often begins with the weeding-out of superfluous details. But he could tell his own lies; he didn’t need a Paul to tell them for him. That would merely put his fiction at a double remove from fact.

Christopher Isherwood, Christopher and his Kind