As we have shown the doctrine of matter to have been the main support of scepticism, so likewise upon the same foundation have been raised all the impious schemes of atheism and irreligion. All these monstrous systems have so visible and necessary a dependence on this supposed material substance that, when this cornerstone is once removed, the whole fabric cannot choose but fall to the ground.

On the same principle does not only fatalism but also idolatry depend in all its varying forms. Did men but consider that the sun, moon, and stars, and every other object of the senses, are only so many sensations in their minds, which have no other existence but barely being perceived, they would never fall down and worship their own ideas, but rather address their homage to that Eternal Invisible Mind which produces and sustains all things.

As in reading books, a wise man will choose to fix his thoughts on the sense rather than lay them out on grammatical remarks; so, in perusing the volume of Nature, it seems beneath the dignity of the mind to affect an exactness in reducing each particular phenomenon to general rules, or showing how it follows from them. We should propose to ourselves n.o.bler views, such as to recreate and exalt the mind, with a prospect of the beauty, order, extent, and variety, of natural things; hence, by proper inferences, to enlarge our notions of the grandeur, wisdom, and beneficence of the Creator.

The reason that is a.s.signed for our being thought ignorant of the nature of spirits is our not having an idea of them. But it is manifestly impossible that there should be any such idea. A spirit is the only substance or support wherein the unthinking beings or ideas can exist; but that this substance which supports or perceives ideas should itself be an idea is absurd.

From the opinion that spirits are to be known after the manner of an idea or sensation have arisen many heterodox tenets and much scepticism about the nature of the soul. It is even probable that this opinion may have produced a doubt in some whether they had any soul at all distinct from their body, since they could not find that they had an idea of it.

But the spirit is a real thing, which is neither an idea nor like an idea. What I am myself, that which I denote by the term "I," is what we mean by soul or spiritual substance; and we know other spirits by means of our own soul, which in that sense is an image or idea of them.

By the natural immortality of the soul we mean that it is not liable to be either broken or dissolved by the ordinary laws of Nature or motion.

The soul itself is indivisible, incorporeal, unextended, and is consequently incorruptible.

_III.--OUR KNOWLEDGE OF G.o.d_

Though there be some things which convince us that human agents are concerned in producing them, yet it is evident to everyone that those things which are called the works of Nature--that is, the far greater part of the ideas or sensations perceived by us--are not produced by, nor dependent on, the wills of men. There is, therefore, some other spirit that causes them, since they cannot subsist themselves.

If we attentively consider the constant regularity, order, and concatenation of natural things, the surprising magnificence, beauty, and perfection of the larger, and the exquisite contrivance of the smaller parts together with the exact harmony and correspondence of the whole--I say, if we consider all these things, and at the same time attend to the import of the attributes, one eternal, infinitely wise, good, and perfect, we shall clearly perceive that they belong to the aforesaid Spirit, who works all in all, and by whom all things consist.

Hence it is evident that G.o.d is known as certainly and immediately as any other mind or spirit whatsoever, distinct from ourselves. We may even a.s.sert that the existence of G.o.d is far more evidently perceived than the existence of men, because the effects of Nature are infinitely more numerous and considerable than those ascribed to human agents.

There is not any one mark that denotes a man, or effect produced by him, which does not more strongly evince the being of that Spirit who is the Author of Nature.

It seems to be a general pretence of the unthinking herd that they cannot see G.o.d. Could we but see Him, say they, as we see a man, we should believe that He is, and, believing, obey His commands. But we need only open our eyes to see the sovereign Lord of all things with a more full and clear view than we do any one of our fellow-creatures. We do not see a man, if by "man" is meant that which lives, moves, perceives, and thinks as we do; but only such a collection of ideas as directs us to think there is a distinct principle of thought and motion like to ourselves, accompanying and represented by it. And after the same manner we see G.o.d.

Men are surrounded with such clear manifestations of Deity, yet are so little affected by them that they seem, as it were, blinded with excess of light.

DESCARTES

DISCOURSE ON METHOD

Rene Descartes was born March 31, 1596, at La Haye, in the ancient province of Touraine, France, of a n.o.ble family of Touraine; and was educated at the College of La Fleche by the Jesuits. The decisive crisis of his life arrived in 1619, while he was serving as a volunteer with Prince Maurice of Na.s.sau, and the next nine years may be regarded as the period of his formation. The most fruitful years of his life were spent in Holland, whence he made occasional excursions into France, and perhaps paid a visit to England. In 1633 he finished his treatise on "The World; or on Light," an epitome of his "Physics," which, however, he deemed it wise, in view of Galileo"s fate, to withhold from publication during his lifetime. Besides the "Discourse on Method" (1637), with the treatises on dioptrics, meteors, and geometry, his princ.i.p.al works were his "Meditations" addressed to the Deans of the Faculty of Theology in the University of Paris; the "Principia Philosophiae," and the "Traite des Pa.s.sions de L"Ame," in which, he handled morals. Descartes died at Stockholm, whither he had been summoned by Queen Christina, on February 11, 1649.

His work stands a landmark in the modern history of philosophic thought.

_I.--THE AIM OF THIS DISCOURSE_

Good sense or reason must be better distributed than anything else in the world, for no man desires more of it than he already has. This shows that reason is by nature equal in all men. If there is diversity of opinion, this arises from the fact that we conduct our thought by different ways, and consider not the same things. It does not suffice that the understanding be good--it must be well applied.

My mind is no better than another"s, but I have been lucky enough to chance on certain ways, which have led me to a certain method by means of which it seems to me that I may by degrees augment my knowledge to the modest measure of my intellect and my length of days. I shall be very glad to make plain in this discourse the paths I have followed, and to picture my life so that all may judge of it, and by the setting forth of their opinions may furnish me with yet other means of improvement.

It is my design not to teach the method which each man ought to follow for the right guidance of his reason, but only to show in what manner I have tried to conduct my own.

I had been nourished on letters from my infancy, but as soon as I had finished the customary course of study, I found myself hampered by so many doubts and errors that I seemed to have reaped no benefits, except that I had observed more and more of my ignorance: Yet I was at one of the most celebrated schools in Europe, and I was not held inferior to my fellow-students, some of whom were destined to take the place of our masters; nor did our age seem less fruitful of good wits than any which had gone before. Though I did not cease to esteem the studies of the schools, I began to think that I had given enough time to languages, enough also to ancient books, their stories and their fables; for when a man spends too much time in travelling abroad he becomes a stranger in his own country; and so, when he is too curious concerning what went on in past ages, he is apt to remain ignorant of what is taking place in his own day. I set a high price on eloquence, and I was in love with poetry; above all, I rejoiced in mathematics, but I knew nothing of its true use.

I revered our theology, but, since the way to heaven lies open to the ignorant no less than to the learned, and the revealed truths which lead thither are beyond our intelligence, I did not dare to submit them to my feeble reasonings.

In philosophy there is no truth which is not disputed, and which, consequently, is not doubtful; and, as to the other sciences, they all borrow their principles from philosophy.

Therefore, I entirely gave up the study of letters, and employed the rest of my youth in travelling, being resolved to seek no other science than that which I might find within myself, or in the Great Book of the World.

Here the best lesson that I learned was not to believe too firmly anything of which I had learnt merely by example and custom; and thus little by little was delivered from many errors which are liable to obscure the light of nature, and to diminish our capacity of hearing reason. Finally, I resolved one day to study myself in the same way, and in this it seems to me I succeeded much better than if I had never departed from either my country or my books.

_II.--THE INTELLECTUAL CRISIS_

Being in Germany, on my way to rejoin the army after the coronation of the Emperor [Ferdinand II.], I was lying at an inn where, in default of other conversation, I was at liberty to entertain my own thoughts. Of these, one of the first was that often there is less perfection in works which are composite than in those which issue from a single hand. Such was the case with buildings, cities, states; for a people which has made its laws from time to time to meet particular occasions will enjoy a less perfect polity than a people which from the beginning has observed the const.i.tution of a far-sighted legislator. This is very certain, that the estate of true religion, which G.o.d alone has ordained, must be incomparably better guided than any other. And again, I considered that as, during our childhood, we had been governed by our appet.i.tes and our tutors, which are often at variance, which neither of them perhaps always gave us the best counsel, it is almost impossible that our judgments should be so pure and so solid as they would have been if we had had the perfect use of our reason from the time of our birth, and had never been guided by anything else.

Hence, as regarded the opinions that I had received into my belief, I thought that, as a private person may pull down his own house to build a finer, so I could not do better than remove them therefrom in order to replace them by sounder, or, after I should have adjusted them to the level of reason, to establish the same once more.

When I was younger I had studied logic, a.n.a.lytical geometry, and algebra. Of these, I found that logic served rather for explaining things we already know; while of geometry and algebra, the former is so tied to the consideration of figures that it cannot exercise the understanding without wearying the imagination, and the latter is so bound down to certain rules and ciphers that it has been made a confused and obscure art which hampers the mind instead of a science which cultivates it. And as a state is better governed which has but few laws, and those laws strictly observed, I believed that I should find sufficient four precepts which follow.

The first was never to accept anything as true when I did not recognise it clearly to be so--that is to say, carefully to avoid precipitation and prejudice, but to include in my opinions nothing beyond that which should present itself so clearly and distinctly to my mind that I might have no occasion to doubt it.

The second was to divide up the difficulties which I should examine into as many parts as possible, and as should be required for their better solution.

The third was to conduct my thoughts in order, by beginning with the simplest objects and those most easy to know, so as to mount little by little, by stages, to the most complex knowledge, even supposing an order among things which did not naturally stand in an order of antecedent and consequent.

And the last was to make everywhere enumerations so complete, and surveys so wide, that I should be sure of omitting nothing.

Exact observation of these precepts gave me such facility in unravelling the questions comprehended in geometrical a.n.a.lysis and in algebra, that in two or three months not only did I find my way through many which I had formerly accounted too hard for me, but, towards the end, I seemed to be able to determine, in those which were new to me, by what means and to what extent it was possible to resolve them. And so I promised myself that I would apply my system with equal success to the difficulties of other sciences; but since their principles must all be borrowed from philosophy, in which I found no certain principles of its own, I thought that before all else I must try to establish some therein. By way of preparation (for I was then but twenty-three years old) I must root up from my mind my previous bad opinion of it, and must practise my method in order that I might be confirmed in it more and more.

_III.--A RULE OF LIFE_

Meanwhile I must have a rule of life as a shelter while my new house was in building, and this consisted of three or four maxims.

The first was to conform myself to the laws and customs of my country, and to hold to the religion in which, by G.o.d"s grace, I had been brought up; guiding myself, for the rest, by the least extreme opinions of the most intelligent. Among extremes I counted all promises by which a man curtails anything of his liberty; for I should have deemed it a grave fault against good sense if, because I approved something in a given moment, I had bound myself to accept it as good for ever after.

My second maxim was to follow resolutely even doubtful opinions when sure opinions were not available, just as the traveller, lost in some forest, had better walk straight forward, though in a chance direction; for thus he will arrive, if not precisely at the place where he desires to be, at least probably at a better place than the middle of a forest.

My third maxim was to endeavour always to conquer myself rather than fortune, and to change my desires rather than the order of the world, and in general to bring myself to believe that there is nothing wholly in our power except our thoughts. And I believe that herein lay the secret of those philosophers who, in the days of old, could withdraw from the domination of fortune, and, despite pain and poverty, challenge the felicity of their G.o.ds.

Finally, after looking out upon the divers occupations of men, I pondered that I could do no better than persevere in that which I had chosen--so deep was my content in discovering every day by its means truths which seemed to me important, yet were unknown to the world.

Having thus made myself sure of these maxims, and having set them apart together with the verities of faith, I judged that for the rest of my opinions I might set freely to work to divest myself of them. For nine years, therefore, I went up and down the world a spectator rather than an actor. These nine years slipped away before I had begun to seek for the foundations of any philosophy more certain, nor perhaps should I have dared to undertake the quest had it not been put about that I had already succeeded.

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