We learn that from the pearl, it brings out most of people's greed and ambition. But, to those few that are senstive to the greed that is surrounding the pearl, they think that it's a powerful symbol of evil and misfortune. Juan Tomas is one of the few people that is senstive and reconizes the devil in the pearl.
The pearl brings out the hopes that Kino has for the future of his family. I think that because, he was putting all his hope into a more comfortable future for his family. For Juana, at first she see a beatuiful picture; but when she finds that Kino wants everything, she sees that the pearl is a harbinger of evil. Therefore she begs Kino to throw it back into the sea. The neighbors are all excited and jealous of the wealth that Kino would be able to get after selling the pearl. I think that because some of the people was planning to kill Kino or steal his pearl. It brings out both the doctor priest's greed, thinking of what they could do to make Kino offer the pearl to them. The townspeople's intrest comes out as to what would happen to Kino, for he has a perfect pearl to sell.
