One of the most noteworthy features of the eighteenth century was the appearance of a large number of doubters of Christianity. In the comparatively long history of the Christian Church, there had often been reformers, who attacked specific doctrines or abuses, but never before, with the possible exception of Italian humanists of the fifteenth century, [Footnote: See above, pp. 124, 182 ff.] had there been such a considerable and influential number who ventured to assail the very foundations of the Christian belief. During the last quarter of the seventeenth century, a number of English philosophers, imbued with enthusiasm for the discovery of scientific laws, went on to apply the newer scientific methods to religion. They claimed that the Bible was untrustworthy, that the dogmas and ceremonies of the churches were useless if not actually harmful, and that true religion was quite natural in man and independent of miraculous revelation. God, they asserted, had created the universe and established laws for it. He would not upset these laws to answer the foolish prayers of a puny human being. Men served God best by discounting miracles, discrediting "superstition," and living in accordance with natural law. Just what this law was, they left largely to the common sense of each man to determine. As a result, the positive side of Deism, as the body of the new teachings was called, was lost in vagueness, and the negative side —the mere denial of orthodox Christianity—became uppermost in men's minds.
Deism was important in several ways, especially for France, whence it was carried from England. (1) For a large part of the most intelligent and influential classes, it destroyed reverence for the Church, and prepared the way for the religious experiments of the French Revolution. (2) It gave an impetus to philosophers who evolved great systems and exhibited wonderful ingenuity and confidence in formulating laws which would explain the why, what, whence, and whither of human life. (3) While casting doubt on the efficacy of particular religions, it demanded toleration for all. (4) Finally, it was responsible for a great increase of indifference to religion. People too lazy or too ignorant to understand the philosophic basis of Deism, used the arguments of Deists in justification of their contempt for religion, and to many people disbelief and intelligence seemed to be synonymous. We have considered Deism here for its significant bearing on the religious situation in the eighteenth century. In the following section we shall see how it was part and parcel of the scientific and intellectual spirit of the times.
SCIENTIFIC AND INTELLECTUAL DEVELOPMENTS IN THE EIGHTEENTH CENTURY
[Sidenote: Art]
As we have observed in an earlier chapter, both science and art flowered in the sixteenth century. The great men of the eighteenth century, however, devoted themselves almost exclusively to science; and the artists of the time were too insincere, too intent upon pleasing shallow-brained and frivolous courtiers, to produce much that was worth while. Great numbers of plays were written, it is true, but they were hopelessly dull imitations of classic models. Imitative and uninspired likewise were statues and paintings and poems. One merit they possessed. If a French painter lacked force and originality, he could at least portray with elegance and charm a group of fine ladies angling in an artificial pool. Elegance, indeed, redeemed the eighteenth century from imitative dullness and stupid ostentation: elegance expressed more often in perfumes, laces, and mahogany than in paint or marble. The silk-stockinged courtier accompanying his exquisitely perfect bow with a nicely worded compliment was surely as much an artist as the sculptor. Nor can one help feeling that the chairs of Louis XV were made not to sit in, but to admire; for their curving mahogany legs look too slenderly delicate, their carved and gilded backs too uncomfortable, for mere use. Chairs and fine gentlemen were alike useless, and alike elegant.
[Sidenote: The New Science]
More substantial were the achievements of eighteenth-century scientists. From philosophers of an earlier century—Francis Bacon (1561-1626) and René Descartes (1596-1650)—they learned to question everything, to seek new knowledge by actual experiment, to think boldly. You must not blindly believe in God, they said, you must first prove His existence. Or, if you will learn how the body is made, it will not do to believe what Hippocrates or any other Greek authority said about it; you must cut rabbits open and see with your own eyes where heart and lungs are hidden beneath the coat of fur. Seeing and thinking for oneself were the twin principles of the new scientific method.
[Sidenote: Isaac Newton]
The new science found many able exponents in the seventeenth and eighteenth centuries, and of them all Sir Isaac Newton (1646-1727) was probably the most illustrious. Coming from a humble family in a little English village, Newton at an early age gave evidence of uncommon intelligence. At Cambridge University he astonished his professors and showed such great skill in mathematics that he was given a professor's chair when only twenty-three years old.
For Descartes, Newton conceived great admiration, and, like Descartes, he applied himself to experimentation as well as to formal mathematics. His boyish ingenuity in the construction of windmills, kites, and water-clocks was now turned to more serious ends. Like other scientists of the day, he experimented with chemicals in his laboratory, and tried different combinations of lenses, prisms, and reflectors, until he was able to design a great telescope with which to observe the stars.