“If you strike me down, I shall become more powerful than you can possibly imagine.”
There was little in the original trilogy to indicate that the ability of a Jedi to reappear as a shimmering blue ghost wasn’t commonplace, a natural and inevitable thing that happened after a Jedi’s death. Yet this line from Obi-Wan, combined with Darth Vader’s surprise when he vanishes and leaves only his cloak, always suggested that there was more to it. How could Vader, a former Jedi who fought in the Clone Wars and killed many Jedi himself, be surprised by this? While George Lucas’s mythology grew and developed and was refined as he went along, this always suggested a mystery bubbling underneath the story. That mystery might be the key that unlocks the entire Star Wars saga.
All the Jedi in the original trilogy reappear as ghosts, while the Emperor, the only darksider to die a darksider, is cast into a pit in a violent explosion of energy, as if he has fallen into oblivion. This, combined with Obi-Wan’s taunt, implies something profound about a Jedi’s connection to the Force that those on the dark side do not share. When the prequel trilogy came around, Qui-Gon Jinn died and did not vanish into the Force, raising further questions about how and when the Jedi learned the ability. Ironically, it was Qui-Gon himself who held the key.