The "Meditations" are undoubtedly a milestone and a masterpiece of Western thought. Through them, Descartes became the father of modern philosophy, and epistemology remained its fundamental discipline for centuries. To this day, few other groundbreaking works lend themselves better to experiencing philosophical thinking and its processes through engagement with the arguments of a classic. The nine chapters of this commentary are original contributions. They aim to accompany students and lecturers during their reading and enhance the intellectual pleasure derived from the depth and beauty of the "Meditations." Contributions from Lilli Alanen, Gary Hatfield, Andreas Hüttemann, Andreas Kemmerling, Tobias Rosefeldt, Andreas Schmidt, and Hans-Peter Schütt.