What is a passage that is important to the climax of The Alchemist and why?

Theoccurs
when Santiago and the alchemist are captured by Arab tribesmen who accuse them of being spies.
On further questioning, the alchemist tells the Arabs that Santiago is an alchemist who can
destroy the military camp by summoning the wind if he chooses to. The chief demands to see such
a preposterous claim fully demonstrated, and the alchemist asks for three days for Santiago to
accomplish this feat.

Santiago is frantic because he does not know how to
turn himself into the wind. However, in due time, he comes to learn the truth about the wind and
personal miracles. One of the...

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