The mix of illusion and reality that runs through the play is also a particularly relevant theme at this time. For this is at the heart of what we do each year. With your participation, we visit people and worlds where the normal, earthbound laws of physics no longer apply. ... Not only is the play filled throughout with the imagery of dreams, but Puck even addresses the audience at the play's close with the advice that if they've not been pleased with what they've seen, they should just tell themselves that they've been dreaming, and will wake up with nothing lost. And what's to say that we haven't been dreaming while this parade of characters has performed across the stretch of our imagination?
Source: commenting on Shakespeare's *A Midsummer Night's Dream*