Bury your feelings deep down, Luke. They do you credit, but they could be made to serve the Emperor.

Obi Wan Kenobi (Alec Guinness)

8 seconds sound clip from the Star Wars: Episode VI - Return of the Jedi movie soundboard.

You can hear this line at 00:48:08.786 in the Blu-ray version of the movie.

Quote context

[...]

- To protect you both from the Emperor, you were hidden from your father when you were born.

- The Emperor knew, as I did, if Anakin were to have any offspring, they would be a threat to him.

- That is the reason why your sister remains safely anonymous.

- Leia! Leia's my sister.

- Your insight serves you well.

- Bury your feelings deep down, Luke. They do you credit, but they could be made to serve the Emperor.

- Well, look at you, a general, huh?

- Someone must have told them about my little manoeuvre at the Battle of Tanaab.

- Well, don't look at me, pal. I just said you were a fair pilot. I didn't know they were looking for somebody to lead this crazy attack.

- I'm surprised they didn't ask you to do it.

- Who says they didn't? But I ain't crazy.

[...]