Whatever this is, I don't understand the point of secrecy.

5 seconds sound clip from the Rain Man (1988) movie soundboard.

You can hear this line at 00:17:47 in the Blu-ray version of the movie.

Quote context

[...]

- In what 1980 comedy film did Goldie Hawn get away from it all? Lisa?

- Private Benjamin.

- Excuse me, please. I want to watch the TV, please.

- For whose grandson was the presidential retreat Camp David named? Lisa?- -Eisenhower.

- That's right. For David Eisenhower.

- You've got another five. $10 lead for Lisa.

- In days of yore, what would a swashbuckler keep in his sheath?

- Whatever this is, I don't understand the point of secrecy.

- This patient is an old girlfriend of my father's?

- I knew your father since you were two years old.

- The year my mother died.

- Look, I'm trustee of the fund, but this hospital receives nothing from that.

[...]