Marianne Williamson is perhaps one of the most outspoken and well-known students of A Course In Miracles. She is a co-leader of the United States Department of Peace movement, sharing leadership responsibilities with United States Congressman Dennis Kucinich. This is a nonprofit organization dedicated to introducing certain principles of non-violence into mainstream American political discourse, by actively lobbying for the creation of a US cabinet level position of Secretary of Peace.
One particular misattributed statement of Williamson's is noteworthy. Doing a Google search on this commonly misattributed quote shows up over 11,000 references to it. This is Marianne Williamson's statement from one of her works that begins: "Our deepest fear is not that we are inadequate. Our deepest fear is that we are powerful beyond measure...." Quite frequently on the internet this quote is misattributed to Nelson Mandela. This statement was not used by Mandela, which is confirmed by Mandela's own organization, the African National Congress.
In addition to her political and speaking activities, Williamson is a bestselling author of A Return to Love, The Healing of America, A Woman's Worth, Enchanted Love, Illuminata, and other works. Williamson also does charitable work in aid of people with life-challenging illnesses.