Dr. Fred Richmond: Like I said... the mother... Now to understand it the way I understood it, hearing it from the mother... that is, from the mother half of Norman's mind... you have to go back ten years, to the time when Norman murdered his mother and her lover. Now he was already dangerously disturbed, had been ever since his father died. His mother was a clinging, demanding woman, and for years the two of them lived as if there was no one else in the world. Then she met a man... and it seemed to Norman that she 'threw him over' for this man. Now that pushed him over the line and he killed 'em both. Matricide is probably the most unbearable crime of all... most unbearable to the son who commits it. So he had to erase the crime, at least in his own mind. He stole her corpse. A weighted coffin was buried. He hid the body in the fruit cellar. Even treated it to keep it as well as it would keep. And that still wasn't enough. She was there! But she was a corpse. So he began to think and speak for her, give her half his time, so to speak. At times he could be both personalities, carry on conversations. At other times, the mother half took over completely. Now he was never all Norman, but he was often only mother. And because he was so pathologically jealous of her, he assumed that she was jealous of him. Therefore, if he felt a strong attraction to any other woman, the mother side of him would go wild.
[Points finger at Lila Crane]
Dr. Fred Richmond: When he met your sister, he was touched by her... aroused by her. He wanted her. That set off the 'jealous mother' and 'mother killed the girl'! Now after the murder, Norman returned as if from a deep sleep. And like a dutiful son, covered up all traces of the crime he was convinced his mother had committed!

Dr. Fred Richmond: No. I got the whole story - but not from Norman. I got it - from his mother. Norman Bates no longer exists. He only half-existed to begin with. And now, the other half has taken over. Probably for all time.
Lila Crane: Did he kill my sister?
Dr. Fred Richmond: Yes, - and no.

Tom Cassidy: I'm buying this house for my baby's wedding present. Forty thousand dollars, cash! Now, that's... not buying happiness. That's just... buying off unhappiness.
[waves money in front of Marion]
Tom Cassidy: I never carry more than I can afford to lose! Count 'em.
Caroline: I declare!
Tom Cassidy: [staring at Marion] I don't! That's how I get to keep it!
George Lowery: Tom, uh... cash transactions of this size! Most irregular.

Caroline: [taking pill bottle out of purse] I've got something - not aspirin. My mother's doctor gave them to me the day of my wedding. Teddy was furious when he found out I had taken tranquilizers!
Marion Crane: [applying lipstick] Any calls?
Caroline: Teddy called me - my mother called to see if Teddy called. Oh, your sister called to say she's going to Tucson to do some buying and she'll be gone the whole weekend, and
[coversation interrupted]

California Charlie: I'm in no mood for trouble.
Marion Crane: What?
California Charlie: There's an old saying, "First customer of the day is always the trouble!" But like I say, I'm in no mood for it, so I'm gonna treat you so fair and square that you won't have one human reason to give me...
Marion Crane: Can I trade my car in and take another?
California Charlie: Do anything you've a mind to. Bein' a woman, you will. That yours?
Marion Crane: Yes, it's just that - there's nothing wrong with it. I just...
California Charlie: Sick of the sight of it! Well, why don't you have a look around here and see if there's somethin' that strikes your eyes, and meanwhile I'll have my mechanic give yours the once over. You want some coffee? I was just about...
Marion Crane: No, thank you. I'm in a hurry. I just want to make a change, and...
California Charlie: One thing people never oughtta be when they're buyin' used cars, and that's in a hurry. But like I said, it's too nice a day to argue. I'll uh - shoot your car in the garage here.

California Charlie: It's the first time the customer ever high-pressured the salesman. I figure roughly... your car plus seven hundred dollars.
Marion Crane: Seven hundred dollars?
California Charlie: You always got time to argue money, huh?

Norma Bates: [voice-over] No! I tell you no! I won't have you bringing some young girl in for supper! By candlelight, I suppose, in the cheap, erotic fashion of young men with cheap, erotic minds!
Norman Bates: [voice-over] Mother, please...!
Norma Bates: [voice-over] And then what? After supper? Music? Whispers?
Norman Bates: [voice-over] Mother, she's just a stranger. She's hungry, and it's raining out!
Norma Bates: [voice-over] "Mother, she's just a stranger"! As if men don't desire strangers! As if... ohh, I refuse to speak of disgusting things, because they disgust me! You understand, boy? Go on, go tell her she'll not be appeasing her ugly appetite with MY food... or my son! Or do I have tell her because you don't have the guts! Huh, boy? You have the guts, boy?
Norman Bates: [voice-over] Shut up! Shut up!

Marion Crane: Do you have any vacancies?
Norman Bates: Oh, we have 12 vacancies. 12 cabins, 12 vacancies.

Marion Crane: I'll lick the stamps.

Marion Crane: Oh, we can see each other. We can even have dinner but respectably in my house with my mother's picture on the mantel and my sister helping me broil a big steak for three.
Sam Loomis: And after the steak, do we send Sister to the movies? Turn mama's picture to the wall?