Chris Csont looks how a little deception makes heroes [feel more genuine](https://thisbuildscharacter.com/2017/05/12/show-me-what-you-lie-about-and-ill-show-you-who-you-are/):
> As the audience, we have an important advantage over the other people in a character’s world: We can see a character when they think nobody’s watching.
> When we see the contradiction between a character’s presented self and their internal self, it helps to make a fictional person feel dimensional and real. We relate to that feeling of having a part of yourself cordoned off from the rest of the world, and we also recognize the discomfort of having that barrier breached.
It’s a great piece with lots of examples.