EN
The paper concerns itself with the beginnings of the development of Heidegger’s thought between the years 1909 and 1912, as witnessed in his articles and reviews for the university magazine Der Akademiker and in his first purely philosophical articles – The Problem of Reality in Modern Philosophy and Recent Investigations in Logic – which were published in 1912 in the Catholic Literarische Rundschau. These sources reveal how Heidegger’s growth from Catholic attitudes to a critique of the Aristotelian-Scholastic system was significantly influenced by his interest in the problematic of pure logic which led him to deal with not only the conception of Frege, but also the philosophical system of Heinrich Rickert.