MURRAY: If you’re insubordinate with me, Lawrence, I’ll put you under arrest!

LAWRENCE: It’s my manner, sir.

MURRAY: What?

LAWRENCE: My manner, sir. It looks insubordinate, but it isn’t really.

MURRAY: I can’t make out whether you’re bloody bad-mannered or just half-witted.

LAWRENCE: I have the same problem, sir.

MURRAY: Shut up!

LAWRENCE: Yes, sir.

Robert Bolt (1924-1995) English dramatist

Lawrence of Arabia, Part 1, sc. 38 (1962) [with Michael Wilson]
    (Source)

In the movie, the dialog is nearly identical:

MURRAY: If you're insubordinate with me, Lawrence, I shall put you under arrest.
LAWRENCE: It's my manner, sir.
MURRAY: Your what?
LAWRENCE: My manner, sir. It looks insubordinate, but it isn't really.
MURRAY: Well, I can't make out whether you're bloody bad-mannered or just half-witted.
LAWRENCE: I have the same problem, sir.
MURRAY: Shut up.
LAWRENCE: Yes, sir.