Chase, John Michael Max Planck Research Group Experience in the Premodern Sciences of Soul and Body ca. 800–1650, Max Planck Institute for the History of Science, Max Planck Society;
Hadot, Pierre: Don’t Forget to Live: Goethe and the Tradition of Spiritual Exercises: N’oublie pas de vivre: Goethe et la tradition des exercices spirituels (2008). (2023). Chicago, IL: The University of Chicago Press. doi:10.7208/chicago/9780226497334.