The metaphor comparing a person's strength to that of stones conveys an image of unwavering resilience and solidity. Stones symbolize endurance, permanence, and an almost eternal fortitude — qualities that imply a deep inner strength capable of withstanding pressure, adversity, and the ravages of time. The use of the word "suddenly" evokes a moment of realization or an abrupt confrontation where this strength becomes vividly apparent. It suggests that an individual’s endurance is not always visible but can manifest powerfully and unexpectedly when challenges arise.

Reflecting on this quote from My Soul to Keep by Tananarive Due, one is reminded of the potency of latent resilience in human spirit. It paints a picture of someone who, like stones, may appear quiet or unyielding but possesses an unbreakable core. Life often demands a reservoir of such strength, especially in moments of crisis where calm firmness and steadfastness can be the key to survival and transformation. This also touches on the notion of being underestimated; strength that is not boisterous but quietly formidable can strike suddenly and decisively.

Moreover, the brevity and fragmented nature of the quote leave space for the imagination to explore the dynamics between strength and vulnerability. Sometimes, strength is not loud or constantly evident but can emerge in a breakthrough, profoundly altering the course of events. The stone metaphor beautifully encapsulates the idea that true power lies in the unwavering, in the deeply rooted ability to endure and break through obstacles without losing oneself.