The philosophy of Wolff was an offshoot directly from Leibnitz, indirectly from the Cartesian school. It is hardly necessary to reiterate the remark that the revolution in thought wrought by Descartes was nothing less than a protest of the human mind against any external authority for the first principles of its belief. Two great philosophers followed out his method in an independent manner; Spinoza, who attempted to exhibit with the rigour of deduction the necessary development of the idea of substance into the various modes which it assumes; and Leibnitz,[663] who, with less attempt at formal precision of method, starting with the idea of power, endeavoured, by means of the monadic theory, which it is unnecessary here to explain, to exhibit the nature of the universe in itself, and the connexion of the world of matter and of spirit. Wolff was a disciple of Leibnitz; great as a teacher rather than an inventor, who invested the system of his master slightly modified, with the precision of form which raised it to rivalry with the perfect symmetry of Spinoza's system. Adopting his master's two great canons of truth, the law of contradiction as regulative of thoughts, and the law of the sufficient reason as regulative of things,[664] he attempted in his theoretic philosophy to work out a regular system on each of the great branches of metaphysic,—nature, the mind, and God; by deducing them from the abstract ideas of the human mind.[665] The true method of conducting [pg 215] this inquiry would be strictly an à posteriori one, an analytical examination of our own consciousness, to ascertain what data the facts of the thinking mind furnish with respect to things thought of. But without any such examination Wolff, assuming in reference to these subjects the abstract ideas of the human mind as his data, proceeded to reason from them with the same confidence as the realists of the middle ages, or as mathematicians when they commence with the real intuitions of magnitude on which their science is founded. Thus his whole philosophy was form without matter; a magnificent idea, but not a fact. Yet though really baseless, it was not necessarily harmful.
This philosophy at first met with much opposition from the pietistic party of Halle.[666] The opposition was not due to any theological incorrectness, for Wolff was an orthodox Christian; but arose from the narrow and unnecessary suspicions which religious men too often have of philosophy, and the sensibility to any attempt to suggest a reconsideration of the grounds of belief, even if the conclusion adopted be the same. But the system soon became universally dominant. Its orderly method possessed the fascination which belongs to any encyclopædic view of human knowledge. It coincided too with the tone of the age. Really opposed, as Cartesianism had been in France, to the scholasticism which still reigned, its dogmatic form nevertheless bore such external similarity to it, that it fell in with [pg 216] the old literary tastes. The evil effects which it subsequently produced in reference to religion were due only to the point of view which it ultimately induced. Like Locke's work on the reasonableness of Christianity, it stimulated intellectual speculation concerning revelation. By suggesting attempts to deduce à priori the necessary character of religious truths, it turned men's attention more than ever away from spiritual religion to theology. The attempt to demonstrate everything caused dogmas to be viewed apart from their practical aspect; and men being compelled to discard the previous method of drawing philosophy out of scripture, an independent philosophy was created, and scripture compared with its discoveries.[667] Philosophy no longer relied on scripture, but scripture rested on philosophy. Dogmatic theology was made a part of metaphysical philosophy. This was the mode in which Wolff's philosophy ministered indirectly to the creation of the disposition to make scriptural dogmas submit to reason, which was denominated rationalism. The empire of it was undisputed during the whole of the middle part of the century, until it was expelled towards the close by the partial introduction of Locke's philosophy,[668] and of the system of Kant, as well as by the growth of classical erudition, and of a native literature.
The second cause which ministered to generate rationalism was English deism. The connexion of England with Hanover had caused several of the works of the English deists to be translated in Germany,[669] and the [pg 217] general doctrines of natural religion, expressed by Herbert and Toland, were soon reproduced, together with the difficulties put forth by Tindal. But the direct effect of this cause has probably been exaggerated by the eagerness of those who, in the wish to identify German rationalism with English deism, have ignorantly overlooked the wide differences in premises, if not in results, which separated them, and the regular internal law of logical development which has presided over the German movement.
A more direct cause was found about the middle of the century in the influence of the French refugees and others, whom Frederick the Great invited to his court. Not only were Voltaire and Diderot visitors, but several writers of worse fame, La Mettrie, D'Argens, Maupertuis,[670] who possessed their faults without their mental power, were constant residents. Their philosophy and unbelief were the miniature of that which we have detailed in France. They created an antichristian atmosphere about the court, and in the upper classes of Berlin; and even minds that were attempting to create a native literature, and to improve the critical standard of literary taste, were partially influenced by means of it.[671]
We have now seen the state of the German mind in reference to theology at the beginning of the eighteenth century, and the three new influences which were introduced into it in the interval between 1720 and 1760. The dogmatic tendency became transformed by the Wolffian philosophy; the pietistic retired from a public movement into the privacy of life; while the minds of [pg 218] men were awakened to inquiry by the suggestions of the English deists, or the restless and hopeful tone of the French mind. It was a moment of transition; the streaks of twilight before the dawn. Yet the signs of a change were so slight, that few could as yet discern the coming of a crisis, none predict its form.
We may now proceed to give the history of the theological movement which sprang up, commonly called Rationalism. It admits of natural division into three parts. The first, a period destructive in its tendency, extending to a little later than the end of the century, exhibits the gradual growth of the system, and its spread over every department of theology. The second, reconstructive in character, the re-establishment of harmony between faith and reason, extends till the publication of Strauss's celebrated work on the Life of Christ in 1835; the third, containing the divergent tendencies which have created permanent schools, reaches to the present time.[672] In all alike the harmony of faith and reason was sought: but in the first it was attained by sacrificing faith to reason; in the second and third, by seeking for their unity, or by separating their spheres. A distinguished name stands at the commencement of each period, representing the mind whose speculations were most influential in giving form to the movements. Semler inaugurated the destructive movement; Schleiermacher, the constructive; and Strauss precipitated the final forms which theological parties have assumed. In the present lecture we shall treat only of the first two of these movements.
The first of these periods, extending; from about 1750 to 1810,[673] contains two sub-periods. Till about 1790[674] we find the growth of rationalism. In the last decade of the century we shall meet with its full development; [pg 219] but at the same time the growth of new causes will be perceived, which prepared the way for a total alteration after the commencement of the present century.
The sub-period extending to 1790 is one of transition, in which we can trace three broadly marked tendencies in religion; one within the church, two outside of it. Such classes indeed slide away into each other; nature is more complex than man; but the use of them may be excused as facilitating instruction.
The movement within the church verged from a literary and dogmatic orthodoxy, which existed chiefly at the Saxon university of Leipsic, through the purely literary tendency, of which Michaelis may be taken as a type in the newly formed university of Göttingen, to the freethinking method typified by Semler, orthodox in doctrine, but in criticism adopting free views of inspiration, which mingled itself with the old pietism of the university of Halle.[675]
The two movements outside the church were, a literary one, indicated by Lessing, which found its chief utterance in the periodical literature, then in its infancy;[676] and a thoroughly deist one, connected with the court of Berlin, embodied in the educational institutions of Basedow.[677]