His public life, however, is clouded by thanklessness, want of character, and the taking of bribes. In A.D. 1621 he was convicted by his peers, deprived of his office, sentenced to imprisonment for life in the Tower, and to pay a fine of £40,000; but was pardoned by the king.[486]--The French Catholic =Descartes= started not from experience, but from self-consciousness, with his “_Cogito, ergo sum_” as the only absolutely certain proposition. Beginning with doubt, he rose by pure thinking to the knowledge of the true and certain in things. The imperfection of the soul thus discovered suggests an absolutely perfect Being, to whose perfection the attribute of being belongs. This is the ontological proof for the being of God.--His philosophy was zealously taken up by French Jansenists and Oratorians and the Reformed theologians of Holland, while it was bitterly opposed by such Catholics as Huetius and such Reformed theologians as Voetius.[487]--=Spinoza=, an apostate Jew in Holland, died A.D. 1677, gained little influence over his own generation by his profound pantheistic philosophy, which has powerfully affected later ages. A violent controversy, however, was occasioned by his “_Tractatus Theologico-politicus_,” in which he attacked the Christian doctrine of revelation and the authenticity of the O.T. books, especially the Pentateuch, and advocated absolute freedom of thought.[488] § 164.2. =John Locke=, died A.D. 1704, with his sensationalism took up a position midway between Bacon’s empiricism and Descartes’ rationalism, on the one hand, and English deism and French materialism, on the other. His “Essay concerning Human Understanding” denies the existence of innate ideas, and seeks to show that all our notions are only products of outer or inner experience, of sensation or reflection. In this treatise, and still more distinctly in his tract, “The Reasonableness of Christianity,” intended as an apology for Christianity, and even for biblical visions and miracles, as well as for the messianic character of Christ, he openly advocated pure Pelagianism that knows nothing of sin and atonement.[489]--=Leibnitz=, a Hanoverian statesman, who died A.D. 1716, introduced the new German philosophy in its first stage. The philosophy of Leibnitz is opposed at once to the theosophy of Paracelsus and Böhme and to the empiricism of Bacon and Locke, the pantheism of Spinoza, and the scepticism and manichæism of Bayle. It is indeed a Christian philosophy not fully developed. But inasmuch as at the same time it adopted, improved upon, and carried out the rationalism of Descartes, it also paved the way for the later theological rationalism. The foundation of his philosophy is the theory of monads wrought out in his “_Theodicée_” against Bayle and in his “_Nouveaux Essais_,” against Locke. In opposition to the atomic theory of the materialists, he regarded all phenomena