Non-lucid dreamers perceive themselves as being contained within the experiential world of their dreams. Whether they play starring roles or are only pawns in the dream game, they are still contained in a dream that they take for external reality. As long as they perceive themselves contained in this world, they are sentenced to a virtual prison with walls no less impenetrable for the fact that they are made of delusion.
In contrast, lucid dreamers realize that they themselves contain, and thus transcend, the entire dream world and all of its contents, because they know that their imaginations have created the dream. So the transition to lucidity turns dreamers’ worlds upside down. Rather than seeing themselves as a mere part of the whole, they see themselves as the container rather than the contents. Thus they freely pass through dream prison walls that only seemed impenetrable, and venture forth into the larger world of the mind.