If you want this choice position, have a cheery disposition.
11 seconds sound clip from the Mary Poppins movie soundboard.
You can hear this line at 00:19:10 in the Blu-ray version of the movie.
Quote context
[...]
- George, I think we should listen.
- You said you wanted our help.
- Wanted: A nanny for two adorable children.
- Adorable - well, that's debatable, I must say.
- If you want this choice position, have a cheery disposition.
[...]