I myself willingly took the 'flying dagger' (symbolizing pain or trouble) and embedded it in my heart. Therefore, I have no right to complain or blame anyone else for my present situation.

This poignant couplet speaks of a profound self-realization. The speaker vividly describes a moment where they, themselves, snatched a "flying dagger" – perhaps a challenging situation or a risky choice – and deliberately plunged it into their own heart. This powerful imagery conveys a deep, self-inflicted wound or consequence. The lines then pose a rhetorical question: "What hand could then stop it?" This suggests that once the action was taken by their own volition, there was no external force that could have prevented the outcome. The final line, "Now, what is there to complain about?" acts as an acceptance of responsibility. It's an admission that since the pain or predicament was brought upon oneself, there's no justification for blame or grievance towards others. It's a powerful message about accountability and the futility of complaining after making a conscious choice.