- Control Voice: [Opening Narration] There is no limit to the extension of the curious mind. It reaches to the end of the imagination, then beyond into the mysteries of dreams, hoping always to convert even the dreams into reality, for the greater well being of all mankind.
- Control Voice: [Closing Narration] The curious mind cannot be chained. It is a free mind endlessly searching for the greater freedom that must eventually make every living being joyfully complete within himself, therefore at peace with himself - and his neighbors.
- David Hunt: You scientists are all the same. First you figure out how to make these things, then you call them monsters and don't want them made.
- Franklin Karlin: Because fools use them to destroy instead of build.
- David Hunt: It's a good thing there are practical people around to make final decisions, otherwise there'd never be any progress.
- Ikar: I have taken possession of all of Eric's emotions except one, the one he calls love. He said he gave it to you. If you have it or any part of it, give it to me.
- Prof. Eric Plummer: In Heaven's name what do you live for?
- Ikar: Accomplishment.
- Prof. Eric Plummer: Without satisfaction?
- Ikar: Knowledge.
- Prof. Eric Plummer: Without pleasure?
- Ikar: Conquest.
- Prof. Eric Plummer: Without hate?
- Ikar: Energy.
- Prof. Eric Plummer: For WHAT?
- Ikar: For control.
- Prof. Eric Plummer: You human beings are all alike - disorganized, undisciplined, wasteful of time and energy...
- Prof. Eric Plummer: Who the devil do you're...!
- Ikar: ...disorderly, illogical...