How does Santiago's observation that "they have forgotten to rely on their own instincts" foreshadow later events in Paulo Coelho's The Alchemist?

Perhaps
the most obvious incident foreshadowed by Santiago's comment that people have "forgotten to
rely on their own instincts," in 's can be seen at the story's end
when Santiago is beset by thieves as he travels to the pyramids.

As Santiago
travels across the desert, he comes to a sand dune, and there the omens tell him to dig. He digs
on and on until his hands are scratched and he is exhausted. Suddenly, he hears footsteps behind
him. The men tell Santiago that they have been displaced by the tribal wars. They are
poorthieves searching for money. Santiago is digging and they suspiciously want to know what he
is looking for. Santiago is certain he has found his treasure (at last) and doesn't want to tell
the men what he is doing.

...one of them seized the boy
and yanked him back out of the hole. Another, who was searching the boy's bags, found the piece
of gold.

"There's gold in here," he said.

This is all the...