In her book "A Spark of Light," Jodi Picoult presents a thought-provoking metaphor comparing coal to diamonds. This imagery highlights the transformational journey of coal under intense conditions, emphasizing how something seemingly ordinary can become extraordinary over time. However, the quote challenges readers to consider practicality in life-or-death situations, reflecting on the idea that circumstances can shift our perceptions of value.

When faced with a dire need, such as freezing to death, the practicality of coal, a source of warmth, becomes far more significant than the beauty of a diamond. This contrast illustrates the theme of how one's priorities and values can drastically change based on their immediate circumstances and survival needs. It provokes readers to reflect on what they truly value and how context influences those values.