This straddles the PT and OT eras so I am posting here.. Why didn't Obi Wan simply keep luke as his ward on Tatooine and begin his training as a very young child? Both the pre Disney and new cannon Disney storyline has Obi Wan wait until Luke is "old enough" to start his training but turned away by Oeen on numerous occasions. Yet we also see in the PT that even a nine year old child is too old and has too many attachments to become a Padawan. This was re enforced by Yoda in ESB when he first revels himself to Luke. While Yoda was certainly testing Luke and almost certainly would have trained him no matter what , he was concerned about Luke being older. So why did Obi Wan wait at all ? Find a secluded spot and start Lukes Jedi training ASAP. This has always bugged me a bit... .