 Sturm is a strenuous defender of natural teleology and final causes. In the chapter dedicated to final causes in the PE, Sturm presents to the reader numerous phenomena which are supposed to back up or at least make her inclined to accept the existence of teleology in nature as well as the necessity to study it. Sturm mentions inter alia bodily organs performing certain functions (the eyes are there to see; the heart pumps blood through the body) and the well-adaptedness of certain animals; for instance, in the case of birds (geese, ducks, storks) their wings, the lightness of their bones, and the possession of a certain type of beak. According to Sturm, ends and uses are an inextricable part of the world as a whole and of its parts (PE I: 226). Sturm’s passive forms thus retain the teleological connotation that Aristotelian forms already had, fitting it into a mechanist picture of the universe. Forms are structures of matter aimed at producing certain effects rather than others. They are not only the efficient (passive) conditions for these effects to obtain, but also the final (passive) principles that explain them. Properly speaking, God himself, once again, is the sole final cause in nature, since God is the one who designed, planned and carried out the whole of nature as a gigantic and most perfect clockwork.