- Can't you see that? No matter how you feel, he is.
- But he isn't. There's something missing.

6 seconds sound clip from the Invasion of the Body Snatchers (1956) movie soundboard.

You can hear this line at 00:11:10.160 in the Blu-ray version of the movie.

Quote context

[...]

- Hello, Miles.

- Nice to see you, Wilma, Becky.

- Let's have it. You talked to him what do you think?

- It's him. He's your Uncle Ira, alright.

- He is not.

- How is he different?

- That's just it there is no difference you can actually see.

- He looks, sounds, acts, and remembers like Uncle Ira.

- Then he is your Uncle Ira.

- Can't you see that? No matter how you feel, he is.

- But he isn't. There's something missing.

- He's been a father to me since I was a baby. Always when he talked to me there was a special look in his eye. That look's gone.

- What about memories? There must be certain things that only you and he would know about.

- I've talked to him about them. He remembers them all down to the last small detail just like Uncle Ira would.

- But there's no emotion. None. Just the pretense of it. The words, gesture, the tone of voice, everything else is the same but not the feeling.

[...]