"How can a speck of a universe be physically identical to the great expanse we view in the heavens above?"

In this quote, Brian Greene is questioning the idea of deep space and its vastness. He questions how something as little and irrelevant as a speck can be identical to the tremendous and relatively limitless area of deep space that we see in the sky. This raises the concern of how our understanding of the universe is limited by our human viewpoint and understanding. Greene is highlighting the paradox of how something so small can contain something so large and complex. It likewise challenges our understanding of the universe and encourages us to believe beyond our minimal understandings.