If the heart hears a harsh word, it simply breaks; who can truly know the delicate fragility of this mirror?

In this couplet, the poet compares the human heart to a delicate mirror—pure, reflective, and deeply vulnerable. A harsh word acts just like a thrown stone, effortlessly shattering that inner world into pieces. The quiet sorrow here is that people speak without care, completely unaware of how frail and tender a feeling heart truly is.