Princess Leia: Luke, tell me. What's troubling you?
Luke: Vader's here, now, on this moon.
Princess Leia: How do you know?
Luke: I feel his presence. He's come for me. He can feel when I'm near. That's why I have to go. As long as I stay, I'm endangering the group and our mission. I have to face him.
Princess Leia: Why?
Luke: [pause] He's my father.