The trouble is, I can't forget that I might die tomorrow.

3 seconds sound clip from the Dead Reckoning (1947) movie soundboard.

You can hear this line at 01:35:47.292 in the Blu-ray version of the movie.

Quote context

[...]

- We're going to headquarters?

- You tried to kill me just now.

- You expected me to be the first one out of that room, and you knew that, when I came out, I'd know a lot more than when I went in.

- You know, you're right about that. You're going to fry, Dusty.

- Oh, Rip... Rip, can't we put this behind us? Can't you forget?

- The trouble is, I can't forget that I might die tomorrow.

- Suppose you got sore at me some morning, for leaving the top off the toothpaste tube?

- Then there's Johnny. When a guy's pal's killed, he Oughta do something about it.

- Don't you love me?

- That's the tough part of it, but it'll pass. Those things do, in time.

- And then, there's one other thing. I loved him more.

[...]