In this art, no one can match my mastery; my lineage is a charter, and this is my tongue.

This couplet is a masterclass in poetic confidence. Mir Taqi Mir is addressing his listener, stating that in the world of art (the 'fan'), everyone possesses some depth or secret talent. He asserts his own supreme authority, claiming that his very being is the credential ('sanad'), and his tongue is the proof! It’s a powerful declaration of poetic legitimacy, demanding respect for his skill.