Kino hesitated a moment. This doctor was not of his people. This doctor was of a race which for nearly four hundred years had beaten and starved and robbed and despised Kino's race, and frightened it too, so that the indigene came humbly to the door. And as always when he came near to one of this race, Kino felt weak and afraid and angry at the same time. Rage and terror went together. He could kill the doctor more easily than he could talk to him, for all of the doctor's race spoke to all of Kino's race as though they were simple animals. And as Kino raised his right hand to the iron ring knocker in the gate, rage swelled in him, and the pounding music of the enemy beat in his ears, and his lips drew tight against his teeth – but with his left hand he reached to take off his hat. (1.34)
The Pearl paints a clear picture of the abuse of power involved in colonial oppression.
Kino stood in the door, filling it, and hatred raged and flamed in back of his eyes, and fear too, for the hundreds of years of subjugation were cut deep in him. (3.33)
Kino has been marked and hardened not only by the injustices done to him by those in power, but by the injustices suffered by all the men before him.
Kino has found the Pearl of the World. In the town, in little offices, sat the men who bought pearls from the fishers. They waited in their chairs until the pearls came in, and then they cackled and fought and shouted and threatened until they reached the lowest price the fisherman would stand. But there was a price below which they dared not go, for it had happened that a fisherman in despair had given his pearls to the church. And when the buying was over, these buyers sat alone and their fingers played restlessly with the pearls, and they wished they owned the pearls. For there were not many buyers really – there was only one, and he kept these agents in separate offices to give a semblance of competition. The news came to these men, and their eyes squinted and their fingertips burned a little, and each one thought how the patron could not live forever and someone had to take his place. And each one thought how with some capital he could get a new start. (3.5)
Power simply begets the desire for more power.
"Hold the light," the doctor said, and when the servant held the lantern high, the doctor looked for a moment at the wound on the baby's shoulder. He was thoughtful for a moment and then he rolled back the baby's eyelid and looked at the eyeball. He nodded his head while Coyotito struggled against him.
"It is as I thought," he said. "The poison has gone inward and it will strike soon. Come look!" He held the eyelid down. "See– it is blue." And Kino, looking anxiously, saw that indeed it was a little blue. And he didn't know whether or not it was always a little blue. But the trap was set. He couldn't take the chance. (3.40 – 3.41)
The doctor takes advantage of his position of power over Kino. In this novel, it seems as though power has a positive correlation with evil.
It was supposed that the pearl buyers were individuals acting alone, bidding against one another for the pearls the fishermen brought in. And once it had been so. But this was a wasteful method, for often, in the excitement of bidding for a fine pearl, too great a price had been paid to the fishermen. This was extravagant and not to be countenanced. Now there was only one pearl buyer with many hands, and the men who sat in their offices and waited for Kino knew what price they would offer, how high they would bid, and what method each one would use. And although these men would not profit beyond their salaries, there was excitement among the pearl buyers, for there was excitement in the hunt, and if it be a man's function to breakdown a price, then he must take joy and satisfaction in breaking it as far down as possible. For every man in the world functions to the best of his ability, and no one does less than his best, no matter what he may think about it. Quite apart from any reward they might get, from any word of praise, from any promotion, a pearl buyer was a pearl buyer, and the best and happiest pearl buyer was he who bought for the lowest prices. (4.3)
The pearl buyers hold power over Kino, but they themselves are held in subjugation to the financiers, the men whose money they manipulate.
"We do not know what prices are paid in other places," said Juan Tomás. "How can we know what is a fair price, if we do not know what the pearl buyer gets for the pearl in another place."
"That is true," said Kino, "but how can we know? We are here, we are not there." (4.14 – 4.15)
Men in power subjugate the natives of La Paz by taking advantage of their ignorance and intentionally keeping them in the dark.