and which more especially proceeded from the clergy. Queen Christina of Sweden finally called him to her court at Stockholm, which was the rendezvous for all the most celebrated men of learning of the time, and there he died in 1650.[154] As regards his philosophic works, those which contain his first principles have in particular something very popular about their method of presentation, which makes them highly to be recommended to those commencing the study of philosophy. Descartes sets to work in a quite simple and childlike manner, with a narration of his reflections as they came to him. Professor Cousin of Paris has brought out a new edition of Descartes in eleven octavo volumes; the greater part consists of letters on natural phenomena. Descartes gave a new impetus to mathematics as well as to philosophy. Several important methods were discovered by him, upon which the most brilliant results in higher mathematics were afterwards built. His method is even now an essential in mathematics, for Descartes is the inventor of analytic geometry, and consequently the first to point out the way in this field of science to modern mathematics. He likewise cultivated physics, optics, and astronomy, and made the most important discoveries in these; we have not, however, to deal with such matters. The application of metaphysics to ecclesiastical affairs, investigations, etc., has likewise no special interest for us. 1. In Philosophy Descartes struck out quite original lines; with him the new epoch in Philosophy begins, whereby it was permitted to culture to grasp in the form of universality the principle of its higher spirit in thought, just as Boehme grasped it in sensuous perceptions and forms. Descartes started by saying that thought must necessarily commence from itself; all the philosophy which came before this, and specially what proceeded from the authority of the Church, was for ever after set aside. But since here thought has properly speaking grasped itself as abstract understanding only, in relation to which the more concrete content still stands over on the other side, the determinate conceptions were not yet deduced from the understanding, but taken up only empirically. In Descartes’ philosophy we have thus to distinguish what has, and what has not universal interest for us: the former is the process of his thoughts themselves, and the latter the mode in which these thoughts are presented and deduced. Yet we must not consider the process as a method of consistent proof; it is indeed a deep and inward progress, but it comes to us in an ingenuous and naïve form. In order to do justice to Descartes’ thoughts it is necessary for us to be assured of the necessity for his appearance; the spirit of his philosophy is simply knowledge as the unity of Thought and Being. And yet on the whole there is little to say about his philosophy.