I didn't personally get the vibe that Yoda actually sacrificed himself so Luke/the universe could be saved (c.f. the ridiculously blatant referencing of this motif with Neo in the Matrix films), more that he felt it was his natural time and did not fight against it in the way a Dark Side user would, but took the opportunity afforded by his natural passing to transcend and become a Force ghost.
Interesting thanks. Now that you mention it, it's interesting the Rowling borrows from many of the "dark figure," motifs as well in Potter - Voldermort's demise being not that dissimilar to Sidious.
Meh, I guess everyone borrows from classical literature so they're all plagiarists to some degree. LOL
Rowling seems to be more overt in her borrowing from people like Jung from what I have been told/read or at least giving nods to his ideas in her early books.
I haven't read Rowling, but I wouldn't be suprised. It's hard not to use archetypes in writing; they have such figurative power that they're an easy way to paint a story quickly. It's almost like watching a familiar and predictable dance. If a writer is skilled, you enjoy watching the execution of the piece. If not, it feels hackneyed. Even twists and subversions only gain their storytelling power because of the strength of the archetype they're playing against.
One component of Jung's collective unconscious concept is that humanity itself resonates with certain themes. They crystallise out into symbols relevant to the current age. Joseph Campbell describe these symbols in comparative mythology (at very, very, very great length...)
I think there's a lot to be said for these mythic journey stories. Obviously they work especially well in SF and Fantasy settings, but they're also heavily represented in tales of any genre where a fairly traditional narrative structure is used.
The Dark Side is not less/weaker than the Light Side, so they probably have Force ghosts too, just of a different colour... But what colour would it be?
Nah, Dark Siders don't ghost IMO. Force Ghosting occurs when someone accepts death and subsequently transcends it by becoming part of Force (and so can manifest as a Force presence visible to those strong in the living force: note that Yoda first perceives Qui-Gon when very deep in meditation, and Luke first hears Obi-Wan when under great stress during the trench run and sees him under even greater stress when near death on Hoth).
The very essence of Dark Side power is to preserve one's mortal/temporal traits as long as possible: youth, long life, strength, emotion, etc, etc. It's the antithesis of being a Force Ghost, it seems to me. The Dark Side equivalent to a Force Ghost is how they can live very long mortal lives at the expense of their appearance (read: soul). It's a Faustian thing.