Lawrence of Arabia

When Lawrence finds out that Gasim an Arab fighting with him has been left in the desert  Lawrence unhesitatingly insists and proposes going back for him:

Ali: In God's name understand, we cannot go back.
Lawrence: I can...
Ali: If you go back, you'll kill us all. Gasim you have killed already.
Lawrence: Get out of my way.
Another Arab: Gasim's time is come, Lawrence. It is written!
Lawrence: Nothing is written.

In a triumphant sequence, the heroic, courageous Lawrence retraces his steps, finds the half-dead Gasim (who has been wandering aimlessly), rescues him, and returns into the oasis/camp with Gasim clinging to his saddle. As his camel mount is surrounded by the men, the now-charismatic, sun-baked-faced "Englishman" gives a penetrating, searing look at Ali, and before drinking from water offered to him, he defianty and proudly repeats himself (in a parched voice)

Nothing is written

Lawrence wishes to fulfill his promises to unite the Arab tribes when he continues his work in the desert with British support of arms, money, and training:

Lawrence: Arabia is for the Arabs now. That's what I've told them anyway. That's what they think. That's why they're fighting.
Allenby: Oh surely.
Lawrence: They've only one suspicion. We let them drive the Turks out and then move in ourselves. I've told them that that's false, that we've no ambitions in Arabia. Have we?
Allenby: I'm not a politician, thank god. Have we any ambition in Arabia, Dryden?
Dryden: Difficult question sir.
Lawrence: I want to know sir, if I can tell them, in your name, that we've no ambitions in Arabia.
Allenby: Certainly.

Lawrence fought against the Sykes-Picot Agreement, attempted to undermine it, drove the Arabs on in a desperate race to capture Damascus and declare an independent Arab state before the British Army could get there

It was his view then and later that the Allies had persuaded the Arabs to take up arms against the Turks with a false promise, and that even as the Arabs were fighting, the British and the French were secretly laying claim to the spoils of war in advance, and sharing between themselves the areas that the Arabs had been promised

    Sykes–Picot Agreement-A secret deal