A detail from the Star Wars prequel trilogy assists in highlighting the extent of the tragedy of Anakin Skywalker's fall and what it means to Obi-Wan Kenobi. The friendship between Obi-Wan and Anakin, as shown in Star Wars: Episode I -The Phantom Menace, Star Wars: Episode II — Attack of the Clones, and Star Wars: Episode III — Revenge of the Sith is among the most important in the saga. Through these three movies and Star Wars: The Clone Wars, the strength of their friendship is tested many times, with the two heroes' sibling-like bond remaining intact despite Anakin's forbidden and secret love for Padmé Amidala. However, due to his desire to save Padmé and the manipulations of Darth Sidious/Sheev Palpatine, Anakin is led down the dark path to becoming Darth Vader and participates in a near-fatal duel with Obi-Wan on Mustafar.
In the original Star Wars, Obi-Wan Kenobi obscures this truth from Anakin's son, Luke Skywalker. He not only claims that Darth Vader betrayed and murdered Anakin, rather than revealing that Anakin became Darth Vader, but Obi-Wan also claims that it was his idea to train Anakin as a Jedi. This omits the fact that he had promised his dying master, Qui-Gon Jinn, that he would train the boy. Examining this using the classic Star Wars concept of "from a certain point of view," suggests that both claims are correct and may best be understood as products of Obi-Wan's guilt. The way he views those details isn't fair, but they allow him to attribute more blame to himself and largely absolve Anakin from responsibility.
Related: Star Wars: Why Obi-Wan Really Calls Vader «Darth» In A New Hope
A remarkable detail spotted in the prequel trilogy (via Tumblr) may explain Obi-Wan Kenobi's reasons for doing this.
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