Ask the true value of the beloved's deceitful promise from the one who has been slain by the dagger of refusal.

This couplet poignantly contrasts a sweet, lingering deception with the brutal blow of cold truth. The poet suggests that even a false promise from the beloved is a gift, as it gently keeps hope alive in the lover's heart. Only someone who has been utterly destroyed by the sharp dagger of outright refusal can appreciate just how precious that comforting lie truly was.