Il mondo di un sogno migliore

Jerzy, in Dylan's study, explains that for a few weeks his dreams have been rewriting reality. The Old Boy is not convinced, but he will be forced to change his mind when he realizes for himself that, in fact, the world is being reshaped based on man's dreams. But what does the enormous butterfly perched at the foot of the bed, staring at Jerzy, represent when he wakes up one morning?