 Kepler mastered, like the best scientists, the most complicated technical issues, especially in astronomy, but he always emphasized his philosophical, even theological, approach to the questions he dealt with: God manifests himself not only in the words of the Scriptures but also in the wonderful arrangement of the universe and in its conformity with the human intellect. Thus, astronomy represents for Kepler, if done philosophically, the best path to God (see Hübner 1975; Methuen 1998 and 2009; Jardine 2009, Kirby 2019). As Kepler at the core of his greatest astronomical work confesses (AN, Part II, chap. 7, KGW 6, p. 108, Engl. trans., p. 183), at the beginning of his career he “was able to taste the sweetness of philosophy … with no special interest whatsoever in astronomy.” And, even in his later work, after having calculated many ephemerides and different astronomical data, Kepler writes in a letter of February 17, 1619 to V. Bianchi: “I also ask you, my friends, that you do not condemn me to the treadmill of mathematical calculations; allow me time for philosophical speculation, my only delight!” (KGW 17, let. N° 827, p. 327, lin. 249– 51).