- Think you're doing the right thing, son?
- You mean going? Who's to say in advance whether it's the right thing or the wrong thing? It just means a fresh start in some other place.

10 seconds sound clip from the The Best Years of Our Lives (1946) movie soundboard.

You can hear this line at 02:32:56.193 in the Blu-ray version of the movie.

Quote context

[...]

- Here's an old sweater I found. Remember you wore it in high school?

- Sure.

- You might need it sometime.

- Thanks, Hortense.

- You forgot these, son.

- Oh, I don't want them, Pop.

- What are they?

- Just a lot of fancy words that don't mean anything. You can throw them away.

- Say, these are citations for your medals.

- Why, Freddy, you never showed them to us.

- Those things came in the packages of K rations.

- Well, we'll treasure them, my boy.

- I'll get the socks I washed for you.

- Think you're doing the right thing, son?

- You mean going? Who's to say in advance whether it's the right thing or the wrong thing? It just means a fresh start in some other place.

- How do you know it'll be different anyplace else?

- There's a need here for fellas like yourself that fought and won the war.

- I know you haven't had the best of breaks since you got back but, well, it seems like you ought to stick here, and slug it out a while longer on your own home ground.

- You're all right, Pop. But I know when it's time to bail out. I gotta get going.

[...]