This series of lectures systematically presents the philosophical positions of Kant, Fichte and Hegel as an entity of rationes rather than focusing on the schools of thought established by each. A novelty in itself, this is surpassed by the unique insight that philosophy presents an answer to a knowledge concerning the destination of man as defined in the historical epochs of our tradition. In this case, in the core phase of the final epoch, it is the civic knowledge in the service of duty and liberty as defined by Rousseau, Schiller and Hölderlin.