The quote reflects on the notion that young individuals often embark on life's journey with an idealistic perspective, free from the harsh realities that come with maturity. The speaker suggests that if the young were aware of the difficult truths in life from the outset, it might hinder their enthusiasm and motivation to begin their journeys. This thought implies that ignorance can sometimes be a form of protection, allowing youth to take risks and embrace challenges with a brave heart.

In Cormac McCarthy's "All the Pretty Horses," this idea emphasizes the beauty of youthful innocence and the importance of experiencing life without being weighed down by its complexities. By shielding the young from certain truths, there is an opportunity for growth, adventure, and discovery. The sentiment ultimately reveals a deeper understanding of how life's challenges can shape individuals but also suggests that starting out with a sense of hope is vital for personal development.