High Quality Content by WIKIPEDIA articles! Marguerite Porete (died 1310) was a French mystic and the author of The Mirror of Simple Souls, a work of Christian spirituality dealing with the workings of Divine Love. She was burnt at the stake for heresy in Paris in 1310 after a lengthy trial, after refusing to remove her book from circulation or recant her views. The book is cited as one the primary texts of the medieval Heresy of the Free Spirit.