[The quote captures the transient nature of life and the inevitability of death, highlighting how daily routines can abruptly be overshadowed by the profound reality of mortality.

This reflection emphasizes that although we often go about our daily activities with a sense of normalcy, the ever-present possibility of death is a constant reminder of life's fleeting nature. The phrase 'the instant when it does' suggests the suddenness with which life can change—death may be a moment away at any time, yet we continue to live, beginning and ending, in a series of transient moments.

The comparison between cities and life offers an intriguing perspective. Cities are bustling, ever-changing environments—full of movement, routines, and ongoing transitions. Similarly, human life is a collection of stages and experiences that seem stable but are inherently temporary. This analogy underscores the universality of change and impermanence.

Reflecting on this, it invites us to consider how often we distract ourselves from the reality of mortality by engaging in routine tasks. It provokes a contemplative stance on embracing the transient nature of existence, recognizing the beauty and poignancy in each moment's fleetingness.

Life's ephemeral nature should inspire us to live more intentionally, appreciating the transient beginnings, middles, and inevitable ends that define our existence. It challenges us to find meaning within the impermanence, realizing that even amidst routine, the awareness of mortality can deepen our appreciation for the present moment.

Ultimately, this insight aligns with philosophical perspectives that accept change as an inherent part of life. It calls for a mindful recognition that our routines are temporary, and every moment is precious because it is fragile, fleeting, and finite.