The format of the text is a dialogue among allegorical figures who represent the nature of the relation between the soul and God. The fundamental structure of the discourse is grounded in traditional Neoplatonist philosophy, and courtly language is used to express theological abstractions. The Mirror is a theological treatise which analyzes how love in human beings is related to divine love, and how the human soul by means of this relation may experience a lasting union of indistinct ion with God in this life.

This is the first modern English translation of the complete text. The translation is based on a critical edition of the Old French and Latin versions of The Mirror. The introduction sets The Mirror in the maelstrom of political and ecclesiastical tensions and conflicts, and offers an analysis of the French beguine's thought.