Planet of the Apes1968

George:
[brandishing rifle] Don't try to follow us. I'm pretty handy with this.

Dr. Zaius:
Of that, I'm sure. All my life I've awaited your coming and dreaded it. Like death itself.

George:
Why? I've terrified you from the first, Doctor. I still do. You're afraid of me and you hate me. Why?

Dr. Zaius:
Because you're a man! And you're right. I have always known about man. From the evidence, I believe his wisdom must walk hand in hand with his idiocy. His emotions must rule his brain. He must be a war-like creature who gives battle to everything around him...even himself.

George:
What evidence? There were no weapons in that cave.

Dr. Zaius:
The Forbidden Zone was once a paradise. Your breed made a desert of it ages ago.

George:
It still doesn't give me the why...a planet where apes evolved from men? There's got to be an answer.

Dr. Zaius:
[with surprisingly genuine sympathy] Don't look for it, Taylor! You may not...like, what you'll find.