In Jeannette Walls' book "Half Broke Horses," the theme of unpredictability in life is emphasized. The narrative illustrates how despite careful planning and preparation, unforeseen circumstances can drastically alter one's trajectory. This serves as a reminder of the fragile nature of our endeavors and the potential for disaster lurking just around the corner.

The quote highlights the importance of vigilance and awareness, suggesting that even a small lapse in focus can lead to significant setbacks. Walls effectively conveys that life is full of uncertainties, and being prepared does not guarantee safety or success. It urges readers to appreciate the moments of stability while recognizing the inherent risks present in every endeavor.