In The Pearl, the author, John Steinbeck, uses the pearl to express what human nature is. At the beginning of the novel, the pearl that Kino finds is described as large as being incandescent and as "perfect as the moon"; by the end of the novel, Kino looks at the pearl it is "ugly, gray, like a malignant growth." In general, mankinds are greedy, deceptive and evil. In the novel, Steinbeck tries to say that human nature tendency toward greed, deception and evil, which can cause something good and beautiful to become something bad and evil in both physical and mental ways.

First of all, Steinbeck shows human beings are instinctively greedy. Steinbeck uses the scene to show humans are gluttonous is where the doctor comes to Kino's house and heals Coyotito after Kino has found a pearl. When Coyotito is bitten by the scorpion, Kino takes him...