But what's it all for?
3 seconds sound clip from the Forbidden Planet (1956) movie soundboard.
You can hear this line at 01:02:49 in the Blu-ray version of the movie.
Quote context
[...]
- Yes, a single machine. A cube 20 miles on each side.
- For 2000 centuries it has waited patiently here tuning and lubricating itself, replacing worn parts.
- And nearly a whole dial became active when your ship first approached from deep space.
- I'll show you a section of one of the power units.
- These units are sunk in the body of the planet 50 miles right below our feet.
- Now, be sure and look only in the mirror. Man does not behold the face of the Gorgon and live.
[...]