Abstract
Hermann Cohen′s passionate philosophizing begins with a departure from the letter of the rabbinical doctrine of revelation. Initially his Science of Reason is shaped by a psychology of language based on Plato, Herder, Humboldt, and Steinthal. Later the influence of Kant is prevalent. In the end Cohen′s System of Philosophy becomes the foundation upon which he reappropriates the sources of Judaism in their literalness. His program from 1908/09 onwards is to �think the uniqueness of God as it must be felt.� A distinctive metaphorics comes into being: a hermeneutics of being human anchored in Reason through comparison with an incomparable God. The critical edition of his works illuminates this philosophical process by means of details previously not taken into account