From where did this dust of sighs reside in my heart? Everything has become enveloped, like scattered ash.

This profound couplet questions the very source of deep sorrow. The poet wonders, 'Where did this dust of sighs come from?' The sadness is so pervasive, so inescapable, that it has settled over his entire existence, like his own dust. It captures that feeling of melancholy that isn't tied to any specific event, but just *is*—a permanent state of the soul.