In Paulo Coelho's The Alchemist, what do we learn about Melchizedek after he walks away?

"The old man looked at the boy and, with his hands held together, made several
strange gestures over the boy's head. Then, taking his sheep, he walked away"
(32).

The above passage shows Melchizedek blessing
Santiago as he starts his journey to discover his Personal Legend. The sheep that Melchizedek
walks away with represent ten percent of Santiago's worldly possessions--payment for the king's
advice and help. The next section following this scene shows Melchizedek standing atop an old
fort that looks down on the port below. He is watching the boat that the boy is on drift out to
sea. Coelho reveals at this time that Melchizedek is...

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