In George Eliot's "Middlemarch," the quote reflects the necessity for a man's mind to encompass both vast and narrow perspectives. It suggests that intellectual growth involves continuously adjusting one's focus from the grand schemes of humanity to the specific details at hand. This balance is crucial for understanding the interplay between broader ideals and the intricacies of individual experiences.

The imagery of expanding and shrinking highlights the dynamic nature of thought. While it is essential to aspire toward the larger human context, attention to specific objectives and situations also remains vital. This duality in perspective fosters a richer comprehension of life and its complexities, emphasizing the importance of a flexible and adaptive mindset.