He is a man, entirely like ourselves. He wears a close-fitting suit like a deep-sea diver's armor, but of alien material.
10 seconds sound clip from the The Day the Earth Stood Still (1954) classic radio play.
You can hear this line at 00:06:16 in the radio play.
Quote context
[...]
- Keep calm, everybody! Don't get excited! Keep calm! Quiet!
- A wedge is opened in the smooth unbroken metal skin of the spaceship.
- A ramp slithers out on the grass.
- Against an eerie glow of unearthly light from inside the spaceship stands the Spaceman.
- A spherical helmet entirely conceals his head.
- He holds up his hand. He is going to speak.
- We have come to visit you in peace and with good will. Receive me as a friend.
- Here he comes, men. Watch it. Keep that BAR trained on him.
- He's going for something in his tunic, sir.
- Quiet.
- It's a ray gun or something! I'm gonna let him have it!
[...]