Yes, in business the first lesson one learns is discretion.

— Castel Benac (Herbert Lom)

5 seconds sound clip from the Mr. Topaze (1961) movie soundboard.

You can hear this line at 01:02:07 in the Blu-ray version of the movie.

Quote context

[...]

- I trust you like my own brother. There!

- Well, I'm so happy.

- How can I show my gratitude to you?

- Well, I'll tell you how. You just sign and keep quiet.

- I sign and keep quiet, yes.

- Yes, in business the first lesson one learns is discretion.

- Oh, yes, I understand that.

- Well, now sign, and underneath your name you put Managing Director.

- Sign. Sign.

- Madam, sir, I would just like to say that I am deeply grateful and I'm very, very, very moved.

[...]