The paper briefly sketches the thought of Marguerite Porete and her writing Mirror Simple Souls. It is pointed out possibility indirect influence that could have (through Meister Eckhart) to Arthur Schopenhauer, whose ideas were very influential in later times.

Antoine Rousse,∗1 Christian Rischel,∗2 Sylvain Fourmaux,∗1 Ingo Uschmann,∗3 Eckhart Förster,∗3 Jean-Claude Gauthier,∗4 and Danièle Hulin∗1 ∗1 Laboratoire d’Optique Appliquee-ENSTA, CNRS UMR7639, Ecole Polytechnique, Chemin de la Huniere, France ∗2 Niels Bohr Institute, The Royal Veterinary and Agricultural University, Denmark ∗3 X-ray Optics Group, Institute of Optics and Quantum Electronics, F...