They know, as I do, what a help it is in keeping one's complexion soft and smooth.

6 seconds sound clip from the You Can't Take It with You (1939) classic radio play.

You can hear this line at 00:54:27 in the radio play.

Quote context

[...]

- Well, never mind, Fay. How did you enjoy that summer theater in Maine?

- Oh, it was grand! The only way I know of to get paid for taking a vacation in Maine.

- And I have something to report that will interest you, C. B.

- I found in my summer theater that Lux Soap is just as popular backstage as it is in Hollywood.

- Naturally, I took some with me when I went to Maine because I've used it for years. And I discovered that almost everyone else uses it, too.

- They know, as I do, what a help it is in keeping one's complexion soft and smooth.

- Mm, reports like that make the heart grow fonder.

- Well, you know, Mr. DeMille, it's time for you to give a report of yourself.

- What've you done about next week's play?

- Next Monday night, we're going to have Irene Dunne and David Niven. And the play...

[...]