In "Tortilla Flat," John Steinbeck reflects on the impressive resilience inherent in living organisms, particularly when they face life-threatening situations. He suggests that even as an organism approaches death, it can demonstrate remarkable strength and endurance, showcasing the instinct to survive against the odds.

Additionally, Steinbeck highlights the essential drive of living beings to reproduce, indicating that when threatened, their biological functions prioritize continuation of their species. This focus on reproduction underscores the fundamental instinct that governs life, emphasizing the enduring nature of all living things, even in their most vulnerable moments.