A/N - I don't own Star Wars. Please let me know what you think.
"Pass on what you have learned."
When Luke Skywalker first heard the instruction from Master Yoda on the old Jedi Grand Master's death bed on Dagobah, Luke felt more numb; he had already reasoned his rash decision to face Vader on Bespin had been a fatal and naive mistake, but if he hadn't then he would never have been able to save Leia and Chewie, and while Han had been frozen in Carbonite and sent to Jabba the Hutt because Han had stuck around them mostly because of Leia's stubbornness and lack of understanding of what would happen to Han if he didn't bother to return to pay off his debts, Luke knew it would only have been a matter of time before Darth Vader, tired of waiting, decided to slaughter his friends.
But most of all, he would never have learnt that Darth Vader was once Anakin Skywalker, Luke's father.
The revelation Vader had given him had nearly made Luke, who was already sick and numb with fatigue and pain after his hand had been sliced off during their duel, fall to his death.
How?
How was Vader Anakin Skywalker?
How had it happened?
Why had his father, a Jedi, become a Sith? What had Palpatine offered him?
How had Anakin Skywalker become the relentless cyborg abomination that Palpatine used as his servant and primary enforcer of the Empire?
What was going on? Why did Yoda and Obi-Wan lie to him, in that heartless manner? They had told him Vader betrayed and murdered his father. Obi-Wan's spectral form had arrived, telling him that what he had told him was the truth…from a certain point of view, but while Luke had been disgusted at first, he had to admit he could see where Obi-Wan was coming from.
If Obi-Wan had told him Anakin Skywalker and Darth Vader were one and the same, what would he have done after the old Jedi saved him from the Tusken Raiders? He would likely have rushed off and joined the Empire, and Obi-Wan and Yoda could not allow that. Luke had realised when he had been at Vader's mercy on Bespin, everyone had likely known the truth; Uncle Owen and Aunt Beru had to have known the truth about what had happened to Anakin, hence the reason why neither of his guardians had spoken about Anakin, and Luke realised he was being manipulated, told lies so then he would be focused enough to kill his own father, even if he was a Sith Lord now, and restore the Jedi Order.
But why had Anakin turned to the Dark Side in the first place? Luke had often kicked himself in hindsight when Obi-Wan's ghost vanished for not asking that question.
But following the death of his father on the second Death Star and the death of Palpatine, Luke was left wondering if he should bring the Jedi back or not. While the Order had floundered, especially during the Clone Wars, they had done some good but Luke knew if something went wrong with one of his apprentices, it would result in the galaxy suffering all over again, and he was still confused about why Anakin fell, and what happened to their mother for Leia and himself to be raised apart.
But there were advantages to the Jedi being around. Luke had picked up enough history to know, prior to the Clone Wars, and a thousand years before the Sith in the form of Palpatine and his own father as they ordered the Clones to wipe out the Jedi, the Order had once gone beyond the stars and helped those in need, but as time passed their isolationist attitude did more harm than good, but if he wanted to restore that image of the Jedi, then he could find some Force-sensitives and discover what they were capable of…
But first, he needed to discover what was lost from the Jedi Order. There was still so much he didn't know about the Force, and he needed to discover what he could. The task of rebuilding the Order was challenging, but if he could find some survivors from Order 66 and the years between the inception of the Empire, and the Battle of Yavin, what had happened to some of the Jedi, maybe that would be a good start.