True. I had forgotten about the Prince Vallorum example. However, Vader's character got more blatantly evil as the writing of the first film went on. By the final script and film, not only does he kill Obi-Wan, but kills Luke's father in the back-story. But the teacher/student relationship still remains part of the story, which you've said weighs in on Obi-Wan's decision to help Anakin force-ghost. You're talking about the time-frame circumstances, but I had expressed doubt over Yoda's notional 'liking' of Anakin in the past having more significance than Anakin/Vader saving Luke and killing the Emperor in the process. As to the 'certain time-frame', apparently it can be stretched to an (arbitrary) point beyond a person's death. Mace's death = "it's been too long" vs. Anakin' death = "hurry!! we've got about 20 to 30 minutes tops!!!" . And there's a certain irony in Yoda being taught how to ghost by a deceased Jedi spirit (Qui-Gon) who himself doesn't force-ghost. How long had Qui-Gon being dead/time since TPM passed that he learned this trick from a 'Shaman of the Whills'? To me, a much tidier solution would have been to say that Anakin had learned the ghosting technique sometime while training under Obi-Wan, just as Obi-Wan had learned it from Yoda. Of course, that would conflict with Vader's apparent lack of knowledge of Obi-Wan's power in SW, but then again the Father Vader ret-con wasn't exactly seamless. Speaking of Obi-Wan and Yoda being the only Jedi to learn the technique while still alive: does it strike you as a coincidence that they are also the only two Jedi that Lucas spared the Jedi Purge and thus allowed audiences to get to know over the course of the OT? In my opinion, there is a point where a story can have too many instances of serendipitous elements. The first appearance of Force Ghosting in the Saga: TESB. Even more significant, Lucas was going to have Annikin/Luke's father appear as a force-ghost along with Ben in the first draft of TESB. I said that the 'reasons' you gave for them helping Anakin were selfish, not that helping someone itself is selfish. But their involvement in assisting Luke is the very context in which them 'helping' Anakin force ghost first appears. I don't think it's a coincidence, though perhaps you do. And since you mention his 'earlier writings': Luke's father was going to appear as a force ghost in the first draft of TESB, without any explanation whereby Ben supposedly 'helps' him ghost (Yoda is of course, still alive in the story).