That doesn't sound like the dedicated scientist talking, David.

3 seconds sound clip from the Creature from the Black Lagoon (1954) movie soundboard.

You can hear this line at 00:17:52.497 in the Blu-ray version of the movie.

Quote context

[...]

- Even if David's theory is correct, the chances of finding anything are remote.

- Science is always taking the remote chance. Why don't we try it? We might still turn failure into success.

- Well, there's just one thing, going into unexplored territory with a woman.

- I'm not afraid, David, and we've come this far.

- Yeah, I know, but I keep remembering what happened to Carl's men.

- That doesn't sound like the dedicated scientist talking, David.

- Dedication doesn't mean risking the lives of others.

- I've always found Kay was able to take care of herself.

- But we know nothing about this lagoon.

- I can tell you something about this place. My boys call it the Black Lagoon, a paradise. Only, they say nobody has ever come back to prove it.

[...]