Ancient philosophy had attempted until now in vain to overcome the contradiction between the sense-world and the world of ideas, and to destroy the uncertainty of human thought and life which results from this contradiction. From the time of Plato it had worked at the problem of uniting, without contradiction, Nature and Spirit, whose contradictory nature had first been brought to notice by the founder of metaphysical idealism. Religion, particularly in the Mystery Cults, had tried to solve in a practical way the problem that seemed insoluble by abstract means, and had sought to secure for man a new basis and resting-place by means of devotion and "revelation"--a mystic sinking into the depths of God. But Paul's Christianity first gave a form to all this obscure desire, a form which united the thrills and joy of mystic ecstasy with the certainty of a comprehensive religious view of the world, and enlightened men as to the deepest meaning of their emotional impulse towards certainty: man obtains unity with God and certainty as to the true reality, not by an abstract dialectic, as Plato supposed; not by logical insight into the cosmos in the sense of an abstract knowledge attainable only by the few, but through faith, through the divine act of redemption. To adopt this internally, thereby to live with it directly--this alone can give man the possibility of emerging from the uncertainty and darkness of corporeal existence into the clear light of the spiritual. All certainty of the true or essential being is consequently a certainty of faith, and there is no higher certainty than that which is given to men in faith and piety. As Christ died and was thereby freed from the bonds of the body and of the world, so also must man die in the spirit. He must lay aside the burden of this body, the real cause of all his ethical and intellectual shortcomings. He must inwardly rise with Christ and be born again, thereby taking part in his spiritual certitude and gaining together with the "Life in the Spirit" salvation from all his present shortcomings. It is true that outwardly the body still exists, even after the inner act of redemption has taken place. Even when the man who died with Christ has arisen and has become a new man, he is nevertheless still subject to corporeal limitations. The redeemed man is still in the world and must fight with its influences. But what man gains in the union with the body of Christ is the "Spirit" of Christ, which holds the members of the body together, shows itself to be active in everything which belongs to the body, and acts in man as a supernatural power. This spirit, as it dwells henceforth in the redeemed man, works and directs and drives him on to every action; lifts man in idea far above all the limitations of his fleshly nature; strengthens him in his weakness; shows him existence in a new light, so that henceforth he feels himself no longer bound; gives him the