Because I realized that what was living behind that boy's eyes was purely and simply evil.

— Dr. Sam Loomis (Donald Pleasence)

8 seconds sound clip from the Halloween (1978) movie soundboard.

You can hear this line at 00:39:40 in the Blu-ray version of the movie.

Quote context

[...]

- Oh, I I do have a permit.

- Seems to me you're just plain scared.

- Yes. Yeah, I am, uh

- I met him 15 years ago. I was told there was nothing left. No reason, no conscience, no understanding in even the most rudimentary sense, of life or death, of good or evil, of right or wrong.

- I met this 6-year-old child with this blank, pale, emotionless face and the blackest eyes. The devil's eyes.

- I spent eight years trying to reach him. And then another seven trying to keep him locked up

- Because I realized that what was living behind that boy's eyes was purely and simply evil.

- What do we do?

- He's been here once tonight. I think he'll come back. I'm gonna wait for him.

- I still think I should notify the radio and television

- No. If you do that, they'll see him on every street corner they'll look for him in every house.

[...]