Joanna Harrington: Please don't treat me like a mental patient who has to be humored. I also majored in psychology.

Joanna Harrington: You could learn a lot from children. They believe in things in the dark, although we tell them it's not so. Maybe we've been fooling them.

Dr. John Holden: All good scientists are from Missouri: in other words, they should continually be saying, 'Show me'.

Dr. John Holden: I see you practice white magic as well as black.
Dr. Julian Karswell: Oh yes, I don't think it would be too amusing for the youngsters if I conjured up a demon from hell for them.

Dr. John Holden: Joanna, let me tell you something about myself. When I was a kid, I used to walk down the street with the other kids and when we came to a ladder they'd all walk around it. I'd walk under it, just to see if anything would happen. Nothing ever did. When they'd see a black cat they'd run the other way to keep it from crossing their path. But I didn't. And all this ever did for me is make me wonder why, why people get so panicky about absolutely nothing at all. I've made a career studying it. Maybe just to prove one thing. That I'm not a superstitious sucker like ninety per cent of humanity.

Dr. John Holden: Sit down. Your generosity is becoming overwhelming as it gets closer to ten o'clock. You're staying with me, Karswell. You've sold your bill of goods too well, because I believe you now. I believe that in five minutes something monstrous and horrible is going to happen. And when it does, you're going to be here so that whatever happens to me will happen to you.

Dr. John Holden: Well, after this afternoon, I must confess there are a few things I don't know.

Dr. John Holden: Well, what do you expect me to do? Nobody's free from fear. I have an imagination like anyone else. It's easy to see a demon in every dark corner. But I refuse to let this thing take possession of my good senses. If this world is ruled by demons and monsters we may as well give up right now.

Dr. John Holden: You were right. Maybe it's better not to know.

Dr. Julian Karswell: Do I believe in witchcraft? What kind of witchcraft? The legendary witch that rides on the imaginary broom? The hex that tortures the thoughts of the victim? The pin stuck in the image that wastes away the mind and the body?
Dr. John Holden: Also imaginary.
Dr. Julian Karswell: But where does imagination end and reality begin? What is this twilight, this half world of the mind that you profess to know so much about? How can we differentiate between the powers of darkness and the powers of the mind?