In David Mamet's play "Boston Marriage," the character begins with a bold declaration, urging the audience to bear with him as he embarks on a lengthy speech. The opening phrase, "how dare you," sets a confrontational tone that suggests a deep-seated indignation or challenge against societal norms or another character's actions.

This phrase encapsulates themes of defiance and assertion, indicating that the speaker is about to address issues of power and morality. Through this speech, Mamet explores the complexities of relationships, authority, and the audacity to question the status quo, signaling that the ensuing dialogue will be provocative and thought-provoking.