In "The Fortune of War" by Patrick O'Brian, the protagonist reflects on the implications of old age and its physical changes. He ponders the effects that aging may have on his life and character, considering the limitations that come with it. This contemplation leads him to a deeper understanding of mortality and the inevitability of change as he ventures through life's challenges.

The quote reveals a moment of introspection, highlighting the character's struggle with the passage of time. It evokes a sense of vulnerability and awareness of one's mortality, prompting readers to consider their own perceptions of aging and how it shapes their existence and aspirations.