This pain of separation is what comes to the heart's edge tonight, arriving at the threshold of the soul's chamber.

Mir Taqi Mir captures the profound ache of separation here. He suggests that the pain of being apart isn't just a passing sadness; it's a deep, visceral ache that awakens with the night. The 'mizgaan-e-tar' refers to the threshold of the heart—that delicate point where emotional pain feels most acute. It’s a haunting realization that separation hurts right down to the core of your being.