""The Mirror of the Sinful Soul"" is a spiritual guide written by Queen Margaret of Navarre, a 16th-century French noblewoman and writer. The book is a dialogue between the author and her soul, in which she reflects on the nature of sin, repentance, and salvation. Queen Margaret draws on a range of religious and philosophical traditions, including Christianity, Platonism, and Neoplatonism, to explore the inner workings of the human soul and its relationship...