It means that nothing existed in eternity, no lock was intact; fate (Qaza) gave us this broken heart.

This profound couplet speaks to the inescapable nature of pain and fate. Mir Taqi Mir suggests that the broken heart—the deep ache of disappointment—is not a random accident, but something predetermined. He asks: what could possibly be so painful that it wasn't destined to exist since the beginning of time? The poem implies that suffering itself is a cosmic certainty, gifted to us by destiny.