He couldn't be more honest.

4 seconds sound clip from the Mr. Topaze (1961) movie soundboard.

You can hear this line at 00:42:32 in the Blu-ray version of the movie.

Quote context

[...]

- Normally, all this should end in marriage, but there is a certain difference in their social standing and finances.

- My friend is a lieutenant, whilst the girl is the daughter of a general.

- And here is my question: If my friend were to make a request to the general, how do you think he'd be received?

- This requires careful thought.

- Is your friend a perfectly honest man?

- He couldn't be more honest.

- And is the general a kind, generous-minded man?

- Oh, yes. He has a general's heart.

- Then let your friend make his request. I'm certain he will be received with open arms.

- Well, you are the general.

[...]