Oh, it's not a guilty smile. Simply amused by the sheer nonsense you sometimes talk.

— Mr Stevens (Anthony Hopkins)

6 seconds sound clip from the The Remains of the Day movie soundboard.

You can hear this line at 01:26:41 in the Blu-ray version of the movie.

Quote context

[...]

- You don't like to have pretty girls on the staff. I've noticed.

- Might it be that our Mr. Stevens fears distraction?

- Can it be that our Mr. Stevens is flesh and blood after all, and cannot trust himself?

- You know what I'm doing? I'm placing my thoughts elsewhere while you chatter away.

- Then why is that guilty smile still on your face?

- Oh, it's not a guilty smile. Simply amused by the sheer nonsense you sometimes talk.

- It's a guilty smile.

- You can hardly bear to look at her. That's why you didn't want to take her on. She was too pretty.

- Well, you must be right... You always are.

- Lizzie, aren't you supposed to be turning down the beds? You'd better get on with it, hadn't you?

[...]