Dr. Samuel Loomis: Inside every one us, there exists a dark side. Most people rise above it, but some are consumed by it. Until there is nothing left, but pure evil.
Dr. Samuel Loomis: I really don't know what else to say, Michael. You haven't said a word for fifteen years! Christ, that's a lifetime. That's nearly twice as long as my first marriage. Wow. It's strange, Michael. In a weird way you've become like... like my best friend. Huh! That just shows you how fucked up my life is. I've done all I possibly can for you, so I'm sorry to tell you that this is going to be my last day. Michael, I have to move on. I'm sorry.
Tommy Doyle: I heard that on Halloween night, the boogeyman comes out at night and attacks kids.
Laurie Strode: He likes to eat little boys like you.
Lynda: See anything you like?
Michael Myers, age 10: I need to get out of here.
Dr. Samuel Loomis: He has come back for his baby sister.
Sheriff Leigh Brackett: To do what?
Dr. Samuel Loomis: The darkest souls are not those which choose to exist within the hell of the abyss, but those which choose to move silently among us.
Lynda: You know what that dried up fucking bitch did?
Laurie Strode: What?
Lynda: Calls my dad and tells him what I said. Yeah, that C-U-N-T needs to get laid.
Laurie Strode: What did your dad say?
Lynda: Oh, who cares? I'll just give him the little sweetie pants princess suck up routine: "Daddy's little pookie would never say something like that!"
Sheriff Leigh Brackett: Doc, it sounds like you're talking about the Antichrist.
Dr. Samuel Loomis: Well, perhaps I am.
Ronnie White: Bitch! If you don't think I aint makin' a mental list of all your fuckin' bullshit.
Deborah Myers: Again? Again? Jesus, what is it with you and this goddamn school? I cannot keep coming down here like this.
Principal Chambers: Look Ms. Myers, I do not enjoy calling you down here every five minutes.
Deborah Myers: Really? It sure seems like you fuckin' do.
Dr. Samuel Loomis: Michael, stop.
Michael Myers, age 10: Look at my mask.
Dr. Samuel Loomis: Oh, wow. Beautiful. Yeah. Why is it all black?
Michael Myers, age 10: 'Cause it's one of my favorite colors.
Dr. Samuel Loomis: Well, actually, black isn't a color, is it? It's the absence of color. In the spectrum of colors, you go from black, which is no color, all the way through to white, which is every color. So, technically... not that it really matters, but black isn't a color.
Answer: He was hoping that Laurie would realise that she's really his sister. However, because Laurie was just a baby and raised by another family, she had no idea why Michael was showing her the picture or what it had to do with her.