Star Wars: Episode VI - Return of the Jedi1983

Vader:
(searching for Luke in the Emperor's chamber) You cannot hide forever, Luke.

Luke:
I will not fight you.

Vader:
Give yourself to the dark side. It is the only way you can save your friends. Yes, your thoughts betray you. Your feelings for them are strong. Especially for... (pauses) Sister. So, you have a twin sister. Your feelings have now betrayed her, too. Obi-Wan was wise to hide her from me. Now his failure is complete. If you will not turn to the dark side, then perhaps she will.

Luke:
(revealing himself) NEVER!!!!! (attacks Vader ferociously, eventually backing him onto a railing and cutting off his right hand. He stands over Vader for a moment.)

The Emperor:
(laughing) Good! Your hate has made you powerful. Now, fulfill your destiny and take your father's place at my side.

Luke:
(looks at Vader's severed hand, then turns to face the Emperor, throwing away his lightsaber) Never. I'll never turn to the Dark Side. You've failed, your highness. I am a Jedi, like my father before me.

(Pause)

The Emperor:
(angrily) So be it... Jedi.