Reference #14: On Writing Well
Zinsser's definition of a careful writer comes from baseball player Joe DiMaggio. When asked how he consistently played so well, DiMaggio replied: "I always thought that there was at least one person in the stands who had never seen me play, and I didn't want to let him down."
Write to not let down your newest reader.
Zinsser. On Writing Well, 2006. (302-303)