You can also take that essay and apply it more broadly to human psychology.

People's impressions are their realities. It may not be true reality, but it doesn't matter because those are their impressions.

If someone perceives you as kind or unkind, or a jerk, a clown, a nerd or an all-business wonk - that's their impression of you whether it is true or not.

Some insight into that gives you keys to how others interact around you, and on a business level that is naturally important. And of course the sword cuts both ways, your impressions form your own realities...

Steve