There are three main streams of thought which come to us from the past, and we can neither completely take them up nor withdraw ourselves from them: the Enlightenment, with its philosophic summit in Descartes; the critical philosophy of Kant; and speculative philosophy, with its consummation in Hegel. It has been thought that the Enlightenment, with its starting out from the subject, its unadorned intellectualism, its formal ratiocination, its rejection of everything that is not comprehended in clear and distinct ideas, was transcended at the height of German classical literature, because at that time a life rich in content was set in contrast with it. But, as a fact, no adequate settlement with the Enlightenment has been arrived at; the supposed transcendence is not final, because the elements of truth in the Enlightenment, especially its turning from history to the immediacy and independence of spiritual life, were not properly acknowledged. But to-day it is less the elements of truth of the Enlightenment that are a force than that which is trivial and narrowly human in it--the ratiocination of the subject which, the more empty it is, the more it feels itself to be the measure of all things, and, rejoicing in negation, applies the results of the natural sciences in an attempt to bring about the greatest possible suppression of all spiritual relations. In this form the Enlightenment gains acceptance by the masses, which formerly had seemed inaccessible to it; and thus it becomes an instrument by which life is dissipated and made shallow. From its position of research, philosophy looks down upon this tendency with contempt; but it produces no movement that is able to take up the struggle with this tendency to shallowness, and pass through the struggle victoriously. Kant is often lauded as the spiritual guide of our time; and it is overlooked how much that was certain for him has become doubtful; how many new facts, new problems, new prospects, which cannot be lost to the world of thought we have received from the nineteenth century with its historico-social culture and its overwhelming widening of the horizon. Kant's critique of the reason is based on a conception of science; on a faith in the possibility of a knowledge of truth; on a conviction of a spiritual organisation of man, which are rather in contradiction than in harmony with the main tendencies of the present. His absolute ethic, the pillar of his constructive thought, is incompatible with the empirical and social treatment of morality to which the present does homage. But at the same time we cannot free ourselves from the influence of Kant. For we cannot refute his critique of the reason, breaking up, as it does, the old representation and conception of truth; and, without his ethic, our ethic would lose the appearance of truth and greatness. In the judgment of the present, Hegel experiences a treatment that is just the opposite