The quote reflects a contrast between the perspectives of youth and old age regarding sleep. Young individuals often resist sleep, possibly due to their vibrant energy and the desire to seize the moment, while older people may embrace it as a comforting retreat from life's challenges. This dichotomy highlights the different ways people experience time and rest at various life stages.
In the context of the character's feelings, the notion of feeling "absolutely ancient" suggests a profound weariness or wisdom that comes with age. It emphasizes the passage of time and how one’s outlook can evolve, revealing a deeper appreciation for the simplicity and peace associated with sleep. The character's internal struggle illustrates the broader theme of aging and its impact on one’s mindset.