Which quality is essential for Denny to face his life's hardships?

The essential quality for Denny to face his life's hardships is resilience and support from loved ones. Throughout "The Art of Racing in the Rain," Denny grapples with numerous challenges, including personal loss, legal battles, and the pressures of parenthood. Resilience is crucial as it allows him to bounce back from difficulties and remain steadfast in the face of adversity.

Moreover, the support from his family, friends, and even his dog Enzo plays a significant role in helping him navigate through these tough times. This network of support provides him with emotional strength and practical assistance, which is vital for overcoming obstacles. Together, resilience and a strong support system empower Denny to confront his challenges head-on, making them integral to his journey and growth throughout the story.