Well it's as clear as crystal. It isn't the coffee, it's the bunk. If you don't sleep at night it isn't the coffee that keeps you awake, it's the bunk.

— Jimmy (Dick Powell)

9 seconds sound clip from the Christmas in July (1944) classic radio play.

You can hear this line at 00:06:32 in the radio play.

Quote context

[...]

- Well that's what makes it such a cinch this time!

- Can't you just see it over there on Broadway? A great big electric sign...

- A guy swallows his coffee, and it says, 'if you don't sleep at night, it isn't the coffee, it's the bunk.'

- You gotta' admit, that's some slogan!

- Uh huh!

- Well do you get the point? Do you understand what it means?

- Yes...

- Well it's as clear as crystal. It isn't the coffee, it's the bunk. If you don't sleep at night it isn't the coffee that keeps you awake, it's the bunk.

- I know what it says, I just don't understand it.

- Well, a kid of two could understand it.

- That Viennese doctor in the Sunday paper, he said that old idea's just a superstition. Instead of keeping you awake, coffee makes you sleep.

- Now that's simple enough, isn't it? Coffee makes you sleep!

- It doesn't make me sleep.

- Well, he says it makes you sleep. He's a Viennese doctor.

- Coffee keeps you awake. That's a well known fact! Why are you so pig headed about it?

[...]