[A writer] must try to think clearly, to feel deeply, to...

[A writer] must try to think clearly, to feel deeply, to write honestly. If he is fortunate he will make a living, but his work will never be anymore essentially clear and deep and honest than he himself is, and he will be judged finally not for how many copies his books have sold, but for what they have done to enrich the lives of their readers, now and in time to come.