The Power of Performance
In performing arts, the boundary between the stage and the audience is known as “the fourth wall.” Breaking this boundary is typically considered a no-no. There are exceptions, of course — Annie Hall, Fight Club, Ferris Bueller’s Day Off — but conventionally, the audience and the performers exist in two separate realities; only one of which, the audience, knows that the other is there.
Despite this boundary, it’s the performer’s job to engage the audience by telling a story, teaching a lesson, making us laugh, making us cry. That’s the power of good theatre and film: it influences our thoughts, our emotions and, perhaps, our actions.