In what ways is pardoner being confessional?

The Pardoner is confessional through his prologue and tale in "The Canterbury Tales," where he openly admits to being deceitful and manipulative for financial gain. He reveals his unscrupulous practices, such as selling fake relics and using guilt to extract money from his listeners, demonstrating a lack of remorse for his actions. This confession serves to highlight the Pardoner's moral corruption and hypocrisy.