How does John Steinbeck use imagery in The Pearl?

The imagery is intense ans usually surrounds nature. There are both shadows and light that reflect the characters and tensions of the moment.

Kino awakened in the near dark. The stars still shone and the day had drawn only a pale wash of light in the lower sky to the east. The roosters had been crowing for some time, and the early pigs were already beginning their ceaseless turning of twigs and bits of...