Luke: Master Yoda... is Darth Vader my father?
Yoda: [avoiding the subject] Rest I need. Yes. Rest.
Luke: Yoda, I must know. If you know, tell me.
Yoda: Your father he is.
[pause]
Yoda: Told you, did he?
Luke: Yes.
Yoda: Unexpected this is. And unfortunate.
Luke: Unfortunate that I know the truth?
Yoda: No! Unfortunate that you rushed to face him... that incomplete was your training. That... not ready for the burden were you.