Joad settled himself on the clean sand. "I ain’t gonna sleep in no cave," he said. "I’m gonna sleep right here." He rolled his coat and put it under his head. Muley pulled at the covering brush and crawled into his cave. "I like it in here," he called. "I feel like nobody can come at me."
…"I ain’t sleepin," said Casy. "I got too much to puzzle with." He drew up his feet and clasped his legs. He threw back his head and looked at the sharp stars. Joad yawned and brought one hand back under his head. They were silent, and gradually the skittering life of the ground, of holes and burrows, of the brush, began again; the gophers moved, and the rabbits crept to green things, the mice scampered over clods, and the winged hunters moved soundlessly overhead.

– John Steinbeck

The Grapes of Wrath, Chapter 6. In the chapter’s last lines, Tom Joad, Muley Graves and Jim Casy hide from a police car to avoid being arrested for trespassing. Ironically this is on the property that the Joad family had occupied for generations. Tom shows his instinct to fight and resist the powers that be by refusing to hide in a cave with Muley. The thinker of the trio Casy opts for the open air and stares at the stars searching for inspiration on what direction he should take next with his life.