It's entirely possible that the Jedi's increasingly clouded vision was the...

It's entirely possible that the Jedi's increasingly clouded vision was the result of their own moral degeneration. They'd let so many of their principles slip that the reason they couldn't see the dark side was so close to them was the lack of sharp contrast with themselves, like trying to see a gray nerf in fog. They turned off the light themselves. -Bardan Jusik, former Jedi Knight Kyrimorut,

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