I'm gonna learn big words myself someday.

— Bob Seton (John Wayne)

4 seconds sound clip from the Dark Command (1940) movie soundboard.

You can hear this line at 00:18:11 in the Blu-ray version of the movie.

Quote context

[...]

- Dad, you tell him about me goin' to be a cowboy. Go ahead and tell him.

- That's the only time I was ever in jail, and it was the other fella's fault. I was drunk.

- Drinking, of course, constituting no crime.

- Ma'am?

- I said, drinking, of course, constituting no crime.

- I'm gonna learn big words myself someday.

- Now look. I've listened to you very patiently. I've heard your whole life's history.

- I know what to do for cattle who've eaten too many loco weeds...

- Why sulphur in molasses isn't as good as people think it is...

- And a thousand other things that I've forgotten already.

[...]