What is meant by the quote there are only the pursued the pursuing the busy and the tired and why does nick think of this statement at this particular time?

The quote from F. Scott Fitzgerald's "The Great Gatsby" reflects the different roles individuals play in the pursuit of their desires and ambitions. It suggests a dynamic of longing and exhaustion in social interactions, where some actively chase their goals while others are sought after, and some are overwhelmed by their pursuits. Nick thinks of this statement during a moment of introspection about the characters around him, highlighting the complexities of their relationships and the relentless nature of their pursuits, especially in the context of Gatsby's relentless chase of a dream. This moment captures the essence of the American Dream's allure and its often exhausting consequences.