- Dr. James Stone: And the lenses will be made of glass.
- Elizabeth Dunn: Not meteoric quartz?
- Dr. James Stone: Eck is from another world. We need material from another world in order to see him. By the same token, for him to see us in our environment, his eyes must be corrected by our lenses.
- Dr. James Stone: Now, why... why should these particular lenses make him viible when nothing else does?
- Elizabeth Dunn: Perhaps because they're made from material which came from another world.
- Detective Lt. Runyan: We can't figure it out, Doctor. This is the fifth optical lab that's been destroyed. Now, uh, what kind of a weirdo would do such a thing?
- Dr. James Stone: Probably someone who just doesn't like spectacles.
- [epilogue]
- Control Voice: Paradoxically, Man's endless search for knowledge has too often plundered his courage and warped his vision so that he has faced the unknown with terror rather than awe, and probed the darkness with a scream rather than a light; yet, there have always been men who have touched the texture of tomorrow with understanding and with courage. Through these men, we may yet touch the stars.
- Dr. Bernard Stone: It's just impossible to believe that the government can't find some way to force him to cooperate.
- Detective Lt. Runyan: Your brother's a private citizen, Dr. Stone. He has certain inalienable rights.
- [prologue]
- Control Voice: Since the first living thing gazed upward through the darkness, Man has seldom been content merely to be born, to endure, and to die. With a curious fervor, he has struggled to unlock the mysteries of creation and of the world in which he lives. Sometimes he has won, sometimes he has lost, and sometimes in the tumbling torrents of space and time he has brief glimpses of a world he never even dreams.