O pain of the heart, we desire such a strangeness that even they themselves make an error in its diagnosis.

This couplet speaks to the incredibly strange and ironic nature of heartache. It highlights a peculiar situation where the very people who are meant to understand, diagnose, or offer a solution for the pain in one's heart, are themselves mistaken or making an error in their assessment. It's a poignant observation that sometimes, even those we expect to provide comfort or clarity can fail to grasp the true depth or nature of our suffering. It emphasizes a feeling of profound misunderstanding, making the heart's pain even more solitary and complex.