The quote reflects the narrator's deep introspection regarding a profound bond between two people. Rather than feeling jealousy, the narrator experiences a sense of shame for their inability to grasp the strength of this relationship. It emphasizes how the connection between the two remains unshaken, even amidst challenges like complacency and desire.
This bond is described as foundational, suggesting that their mutual reliance and understanding create a sturdy base for their lives. The narrator acknowledges this habit of being together, which not only supports their existence but also highlights a gap in their own understanding of such enduring relationships.