The heart yearns in blood-red tears, like one who has been trampled by the dust of the door.

This couplet beautifully captures the depth of sorrow. Mir Taqi Mir suggests that the heart throbs with tears that are 'blood-like.' It doesn't mean literal blood, but rather that the pain is so intense, so visceral, that the sorrow feels like a physical wound. It speaks to a kind of heartache that drains the very life force, making the tears themselves heavy with suffering.