Chairman of the President's Committee of Inquiry: [testing Lewis's assertion that the apes can speak] What is your name?
Dr. Zira: Zira.
Chairman of the President's Committee of Inquiry: One might as well be talking to a parrot.
Dr. Zira: A parrot?
Chairman of the President's Committee of Inquiry: What did I tell you? Mechanical mimicry. Unique in an ape, vocally, without a doubt, but... does the other one talk?
Cornelius: Only when she lets me.
Cornelius: They became alert to the concept of slavery. And, as their numbers grew, to slavery's antidote which, of course, is unity. At first, they began assembling in small groups. They learned the art of corporate and militant action. They learned to refuse. At first, they just grunted their refusal. But then, on an historic day, which is commemorated by my species and fully documented in the sacred scrolls, there came Aldo. He did not grunt. He articulated. He spoke a word which had been spoken to him time without number by humans. He said 'No.' So that's how it all started.
Armando: You're asking me to risk imprisonment for the sake of two fugitive apes? The answer is: a thousand times, yes.
Armando: [to baby Milo] Intelligent creature... but then, so was your mother.
[Armando steps away as baby Milo begins to plaintively repeat, 'Mama? Mama? Mama?']
Dr. Otto Hasslein: Negative, negative, negative!
E-1: Don't worry. We'll catch them, sooner or later.
Dr. Otto Hasslein: That's what I'm worried about. Later. Later we'll do something about pollution. Later we'll do something about the population explosion. Later we'll do something about the nuclear war. We think we've got all the time in the world, but how much time has the world got? Somebody has to begin to care.
Dr. Zira: A marriage bed is made for two. But every damn morning, it's the woman who has to make it. We have heads as well as hands. I call upon men to let us use them!
Milo: [after Zira has spoken the first time in the presence of humans] Zira, are you mad?
Cornelius: Please don't call my wife mad!
Milo: I'm not, I'm just merely asking her: Zira, are you mad?
Dr. Lewis Dixon: In a democracy, we do not shoot unarmed suspects on sight for a murder in which their participation is still unproven.
Curator: [in the museum, Zira sees a giant stuffed gorilla and faints] It must have been the shock!
Dr. Zira: [reviving] Shock, my foot... I'm pregnant!
Dr. Zira: [to Dr. Dixon] You're the second human I have kissed.
Cornelius: [to Dr. Branton] And you are the first.
Tailor: May I measure your inside leg, sir?
Reporter: Dr. Hasslein, as the President's Senior Science Advisor, what do you expect to experience from this historic meeting?
Dr. Otto Hasslein: Fear.
Cornelius: By the time the plague was contained, man was without pets. Of course, for man this was intolerable. I mean, he might kill his brother, but he could not kill his dog!
Cornelius: If we are caught, we will almost certainly be killed. Please give us the opportunity... to kill ourselves?
Dr. Lewis Dixon: I shouldn't do this, but I guessed you'd ask.
[Dr. Dixon hands Cornelius a gun]
Dr. Otto Hasslein: Zira, wine is an excellent restorative, I assure you, especially in cases of pregnancy.
Chairman of the President's Committee of Inquiry: [referring to Cornelius] Does the other one talk?
Cornelius: [indicating Zira] Only when she lets me.