The given line highlights the broader theme of determination and the power of will to achieve one's goals. It reflects that no challenge is insurmountable if the purpose is strong and one is resolute.

In the story, the grandmother faces multiple obstacles: her old age of sixty-two, her grey hair, wrinkled hands, and the narrator's mockery. However, her good cause—the desire to read and become independent—fuels her resolve. She refuses to let her physical limitations or societal assumptions stop her.

Furthermore, the line emphasizes the theme that education brings independence. The grandmother feels helpless and dependent when she cannot read a novel on her own and is too embarrassed to ask others. Her determination to overcome this obstacle stems from her deep desire for self-sufficiency.

Additionally, the line underscores the theme that learning has no age bar. The grandmother backs her words with action, working harder than anybody. She reads, repeats, writes, and recites, proving to be a wonderful student who achieves her goal by the Dassara deadline.

Thus, the line encapsulates the story's core message: with unwavering determination, one can conquer any barrier—be it age, physical frailty, or lack of education—to achieve independence and self-respect.