To quote Cicero, rashness is the characteristic of youth, prudence that of mellowed age, and discretion the better part of valor.

— VINCENT LF-396 (Roddy Mcdowall)

8 seconds sound clip from the The Black Hole (1979) movie soundboard.

You can hear this line at 00:08:07.913 in the Blu-ray version of the movie.

Quote context

[...]

- Reinhardt had the knack of making his own ambitions seem like a matter of national pride.

- He talked the Space Appropriations Committee into the costliest fiasco of all time.

- And refused to admit failure. Ignored his recall.

- Maybe not. Maybe it never got through.

- That ship just disappeared. They've never been seen again.

- Get us in close enough. Vincent and I could get aboard on tethers.

- To quote Cicero, rashness is the characteristic of youth, prudence that of mellowed age, and discretion the better part of valor.

- No sense leaving the story of a lifetime untold, Captain.

- I believe there is. And it's looking straight at us.

- Picking up anything on the sensors?

- Negative. But with all that turbulence out there, our signal might not be getting through.

- According to my instruments, it hasn't moved a centimeter since we first spotted it.

- How can a lifeless derelict defy that kind of gravity?

- I don't know, but it's certainly worth investigating.

[...]