The quote from George Eliot's "Middlemarch" reflects on the challenges and realizations that come with marriage. Once a couple begins their journey together, they may find that despite their efforts, they are not progressing as they might have expected. Instead of navigating a vast and open sea, they discover themselves in a confined space. This suggests a sense of stagnation and the need for deeper understanding within the relationship.

The metaphor of exploring an enclosed basin emphasizes the limitations that couples may face. It serves as a reminder that marriage can sometimes feel restrictive, leading to feelings of frustration and disillusionment. As partners navigate this closed environment, they must confront their realities and actively seek ways to grow and find fulfillment together rather than merely accepting their circumstances.