What is the author's tone in Sister Outsider: Essays and Speeches by Audre Lorde?

Most of these essays were intended to be read or heard by Lorde's feminist contemporaries and other members of the academic world. This would normally call for a rather formal style, but Audre Lorde's passion for her subject matter comes across in every piece. Her writing is very persuasive in nature, as she was directly affected by the issues of racism, sexism, and other prejudices and forms of oppression throughout her life.