As is natural with contiguous states having like institutions and like aims of advancement and development, the friendship of the United States and Mexico has been constantly maintained.

The quote "As is natural with contiguous states having like institutions and like aims of advancement and development, the friendship of the United States and Mexico has been constantly maintained" by Chester A. Arthur, the 21st President of the United States, emphasizes the natural and enduring relationship between the two neighboring countries. Arthur highlights that because the United States and Mexico share similar goals for progress and have geographical proximity, their friendship is both logical and consistent. The quote suggests that mutual interests and close geographic ties foster cooperation and a lasting relationship between the two nations.

Arthur’s words reflect the diplomatic perspective of his time, where neighboring nations with shared values and goals often form strong political, economic, and cultural bonds. The reference to institutions and advancement underscores the idea that both countries are working towards similar objectives in terms of economic growth, social progress, and regional stability. This alignment naturally contributes to maintaining friendship, as both nations strive for mutual benefit and development.

The quote also speaks to the broader idea that geographical proximity can help maintain strong diplomatic ties. By pointing out that the United States and Mexico are "contiguous states," Arthur acknowledges that their physical closeness often results in more frequent interactions and stronger diplomatic connections. Such relationships are shaped by shared interests, challenges, and cooperation on issues like trade, security, and cultural exchange.

In conclusion, Chester A. Arthur's quote highlights the longstanding friendship between the United States and Mexico, shaped by their shared goals and geographical proximity. It suggests that friendship between neighboring countries with similar ambitions is natural and enduring, contributing to stable and cooperative relations. Arthur’s statement reflects the diplomatic understanding that strong, mutually beneficial ties are essential for both nations' progress and development.