The Emperor is not as forgiving as I am.
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About this quote

In Return of the Jedi (1983), Darth Vader delivers this line during a tense confrontation in the Emperor's throne room. The line appears amid a power struggle involving Vader, the Emperor, and Luke Skywalker. What makes it stick is the delivery and the stark mood of the scene: short, threatening, and timed to raise the stakes in that moment.