Meaning: This quote is by John Wesley Powell, an American geologist, ethnologist, and explorer known for his exploration of the Colorado River and the Grand Canyon. The quote reflects Powell's understanding of the enduring impact of influential individuals and the ongoing nature of significant undertakings, particularly in the context of land surveys and the management of natural resources.

Powell's reference to "a great man's influence" suggests that the legacy of remarkable individuals continues to shape the world long after their time. This can be interpreted as a recognition of the lasting impact of visionary leaders, innovators, and pioneers whose ideas and actions resonate across time and space. It implies that the influence of such individuals transcends their immediate surroundings and extends into the future, shaping the course of history and inspiring subsequent generations.

Moreover, Powell's assertion that there is "no definite finality, no end, to a great survey" speaks to the perpetual nature of significant endeavors. In the context of land surveys, which was a central focus of Powell's work, this statement underscores the idea that the process of comprehensively mapping and understanding the land is an ongoing, dynamic task. It acknowledges that the needs of a growing population and the expansion of territories necessitate continuous reevaluation and adjustment of surveying practices. This perspective aligns with Powell's own experiences in exploring and studying the American West, where he encountered the complex interplay between natural resources, human settlement, and sustainable development.

The phrase "it runs along for centuries" emphasizes the enduring nature of great surveys and the sustained relevance of their findings and implications. Powell likely intended to convey the idea that the insights and knowledge generated through extensive surveys have enduring value and can inform decision-making and planning over extended periods. This notion is particularly pertinent in contemporary discussions about environmental conservation, land use planning, and resource management, where the long-term implications of human activities on the natural landscape are of paramount importance.

Furthermore, the reference to a great survey being "ever responsive to the strain of the increasing needs of a growing population and an enlarging domain" reflects Powell's awareness of the dynamic and evolving nature of societal and environmental challenges. This observation underscores the necessity of adaptability and responsiveness in the context of surveying and land management. It acknowledges that the demands placed on the land and its resources are subject to change as populations grow, economies develop, and ecosystems evolve. As such, the quote underscores the importance of integrating flexibility and foresight into surveying and resource management practices to ensure their continued relevance and effectiveness.

In summary, John Wesley Powell's quote encapsulates his profound understanding of the enduring influence of remarkable individuals and the perpetual nature of significant undertakings, particularly in the context of land surveys and the management of natural resources. It conveys a sense of continuity and responsiveness, emphasizing the ongoing relevance and adaptability of comprehensive surveys in addressing the evolving needs of society and the environment. Powell's insights continue to resonate in contemporary discourse on sustainable development, conservation, and the responsible stewardship of natural resources.