Tybalt, the reason that I have to love thee
Doth much excuse the appertaining rage
To such a greeting: villain am I none;
Therefore farewell; I see thou know’st me not.
– William Shakespeare
Romeo and Juliet, Act 3, Scene 1. When Tybalt confronts Romeo and insults him by branding him a "villain," Romeo refuses Tybalt’s challenge to fight. He claims that Tybalt doesn’t know him. He says that he has a reason to love Tybalt which allows him to overlook his insult. Romeo is hinting that they are now family because of his secret marriage to Juliet. This is dramatic irony because the audience knows this and Tybalt doesn’t.