People
You probably wouldn’t worry about what people think of you if you could know how seldom they do.
— Olin Miller

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The claim is that our worry about others' opinions is mostly wasted, because people think about us far less than we imagine. It's a comforting, slightly humbling observation: the audience we fear is mostly busy with its own concerns.
Context reviewed