 Besides psychology and gnoseology, the other main spectrum of questions Kepler deals with in Book 4 is his theory of “aspects”, i.e., astrology (HM, IV, Cap. 4–7), a further field of application of his psychology and further evidence of the role of geometry in his philosophy. The “aspects”, i.e., the angles between the planets, Moon and Sun, are all he wishes to save from the old astrology, which he harshly criticizes; for the aspects are or can be reduced to geometrical structures, the archetypes, which can be recognized by the soul. According to Kepler, there is no “mechanical influence” of the heavens (stars and constellations are not relevant in his astrology) which exerts a determining effect on the Earth and on human life. Rather, both the Earth and human beings, ultimately, like all other living entities, are provided with a soul in which the geometrical archetypes are present. By the formation of an aspect in the heavens, symmetry arises and stimulates the soul of the Earth or of human beings. “The Earth,” Kepler writes, responds to “what the aspects whistle” (KGW 11.2, p. 48; for his astrology see especially Field 1984 and Rabin 1997, Boner 2005 and 2006).