Part 1 of our biography of of Johannes Kepler covering his early life from his seminary schooling to his time in Graz. We discuss his school in the lower seminary at Adelburg, the upper seminary at Maulbronn and at Sift at the University of Tubingen. After this we follow him to his assignment at the Protestant school in Graz and his work as the district mathematician. IN this we examine his attitudes on astrology and the publication of the Mysterium Cosmigraphicum.