A Treatise on the Being and Perfections of God, as the Creator and Governor of the world, can scarcely be adapted to the exigencies of modern society, unless it be framed with express reference to the existing forms of unbelief, and the prevailing tendencies both of philosophical thought and of popular opinion. It is quite possible, indeed, to construct a scheme of evidence on this subject out of the ample materials which the storehouse of nature affords, without entering into any discussion of the questions, whether Physical or Metaphysical, which have been raised respecting it. But this method, although it might be sufficient for many, perhaps for most, of our readers for all, indeed, who come to the study of the subject with reflective but unsophisticated minds could scarcely be expected to meet the case or to satisfy the wants of those who stand most in need of instruction; the men, and especially the young men, in all educated communities, who, imbued with the spirit of philosophical speculation, and instructed, more or less fully, in the principles of modern science, have been led, under the influence of certain celebrated names, to adopt opinions which prevent them from seriously considering any theological question, and to regard the whole subject of religion with indifference or contempt, as one that lies beyond the possible range of science, the only legitimate domain of human thought. In such cases (and they are neither few nor unimportant), it may be useful and even necessary to neutralize those adverse presumptions or “prejudicate opinions,” which prevent them from considering the evidence to which Theism appeals, and to review the various theories from which they spring, so as to show that they afford no valid reason for discarding the subject, and no ground for alleging that it is not fit to go to proof. It is true that we must ultimately rely, for the establishment of our main positions, on that body of natural and historical evidence, which depends little, if at all, on any of the Theories of Philosophical Speculation, or even on any of the discoveries of Physical Science; but it is equally true that the evidence, however conclusive in itself, cannot be expected to produce conviction unless it be candidly examined and weighed; and if there be anything in the existing state of public opinion which leads men to regard the whole subject with indifference or suspicion, to conceive of it as a problem insoluble by the human faculties, and to treat Theology as a fond fancy or a waking dream, it were surely well to examine the grounds of such opinions, to expose their fallacy so as to counteract their influence, and to refute those theories which prevent men from judging of the evidence as they would on any other topic of Inductive Inquiry. In adopting this course, we are only following the footsteps of the profound author of the “Analogy,” who finding it, he knew not how, “to be taken for granted, by many persons, that Christianity is not so much as a subject of inquiry,” set himself, in the first instance, to prove “that it is not, however, so clear a case that there is nothing in it;” this preliminary proof being designed to neutralize objections, and to disburden the subject of all adverse presumptions, so as to be judged on its own proper and independent merits. We are imitating, too, the example of another sagacious writer on a kindred theme, who thought that “Apologists had paid too little attention to the prejudices of their opponents, and had been too confident of accomplishing their object at once, by an overpowering statement of the direct evidence, forgetting that the influence of prejudice renders the human mind very nearly inaccessible to both evidence and argument."

If this method was ever necessary or expedient, it is peculiarly so in the present age. Opinions are afloat in society, and are even avowed by men of high philosophical repute, which formally exclude Theology from the domain of human thought, and represent it as utterly inaccessible to the human faculties. They amount to a denial, not merely of its truth, but of its very possibility. They place it among the dreams of the past with the fables of the Genii, or the follies of Alchemy, or the phantoms of Astrology. They intimate, in no ambiguous terms, not only that Catholicism is effete, and Christianity itself dead or dying, but that Theology of every kind, even the simplest and purest form of Theism, must speedily vanish from the earth. Admitting that the religious element was necessarily developed in the infancy of the species, and that its influence was alike inevitable and salutary during the world’s minority, when it was placed provisionally “under tutors and governors,” they proclaim that mankind have outgrown the vestments which suited them in earlier times, and that now they must “put away childish things.” That such sentiments have been publicly avowed, that they have been proclaimed as the scientific results of speculative thought, and that they have been widely circulated in the vehicles both of philosophic discussion and of popular literature, will be proved by evidence, equally sad and conclusive, in the succeeding chapters; in the meantime we refer to them merely for the purpose of showing that, in so far as their influence prevails, they must necessarily tend, unless they be counteracted by some effective antidote, to generate such a prejudice against the whole scheme of Theology, whether Natural or Revealed, as may be expected, especially in the case of young, inexperienced, and ardent minds, to prevent them from entertaining the subject at all, or examining, with serious and candid interest, any kind or amount of evidence that might be adduced in regard to it. For this reason, we propose to review the various Theories or Systems which may be said to embody and exhibit these prevailing tendencies, to meet our opponents on their own chosen ground, and to subject their favorite speculations to a rigorous and sifting scrutiny; and this, not for the purpose of proving our fundamental position, for that must rest on its proper and independent evidence, but simply with the view of neutralizing the adverse presumptions which prevent many from considering its claims, and proving that it is a subject that demands and deserves their serious and sustained attention.

Taking a comprehensive view of European Science and Literature during the last half century, we may discern the great currents, or chief tendencies, of speculative thought, in so far as it bears on the evidences and doctrines of Religion, in several distinct but closely related systems of opinion, which, whether considered severally or collectively, must exert, in proportion to their prevalence, a powerful influence on the side of Atheism. These systems may be divided generally into two great classes, according as they relate to the substance or to the evidence of Theism, to the truths which it involves, or the proofs to which it appeals. The interval between the first and second French Revolutions may be regarded as the season during which the theories to which we refer were progressively developed, and ultimately consolidated in their existing forms. The germ of each of them may have existed before, and traces of them may be detected in the literature of the ancient world, and even in the writings of mediaeval times; nay, it might not be too much to affirm that in the systems of Oriental Superstition, and in the Schools of Grecian Skepticism, several of them were more fully taught in early times than they have yet been in Modern Europe, and that the recent attempts to reconstruct and reproduce them in a shape adapted to the present stage of civilization, have been poor and meagre in comparison with those more ancient efforts of unenlightened reason. What modern system of Skepticism can rival that of Sextus Empiricus? What code of Pantheism, French or German, can be said to equal the mystic dreams of the Vedanta School? What godless theory of Natural Law can compete with the Epicurean philosophy, as illustrated in the poetry of Lucretius? The errors of these ancient systems have been revived even amidst the light of the nineteenth century, and prevail to an extent that may seem to justify the apprehension, frequently expressed on the Continent of late years, of the restoration of a sort of Semi-Paganism in Modern Europe; and it is still necessary, therefore, for the defence of a pure Theism, to reexamine those ancient forms of error which have reaeppeared on the scene after it might have been supposed that they had vanished for ever. For the very tenacity with which they cleave to the human mind, and their perpetual recurrence at intervals along the whole course of the world’s history, show that there must be something in the wants, or at least in the weaknesses of our nature, which induces men to tolerate and even to embrace them. But the chief danger, as we conceive, lies in those new, or at least newly organized, theories that have only recently received their full development in the Inductive and Scientific pursuits which constitute the peculiar glory of modern times; and which, commencing with the era of Bacon and Descartes, and gradually matured by Newton, Leibnitz, and their successors, have at length issued in the construction of a solid fabric of Science. To Theism there is no danger in Science, in so far as it is true, for all truth is self-consistent and harmonious; but there may be much danger in the use that is made of it, or in the spirit in which it is applied. In the hands of Bacon, and Newton, and Boyle, the doctrine of Natural Laws was treated as an ally, not as an antagonist, to Theology; in the hands of Comte it becomes a plea for Atheism; and even in the hands of Combe an argument against a special Providence and the efficacy of prayer. Here the danger is the greater just by reason of the acknowledged truth and practical value of the Inductive Philosophy; for its certainty is so well ascertained, and its manifold uses so generally appreciated, that if it shall come to be regarded as incompatible with the recognition of God and Religion, Society will soon find itself on the verge of universal Atheism. And this is the fearful issue to which the more recent schools of speculation are manifestly tending. The first French Revolution was brought about by the labors of men who fought against Christianity, at least ostensibly, under the banner of Deism or Natural Religion; the second Revolution was consummated under the auspices, not of a Deistic, but of an Atheistic philosophy. The school of Voltaire and Rousseau has given place to the school of Comte and Leroux. The difference between the two indicates a rapid and alarming advance. It may not be apparent at first sight, or on a superficial survey; but it will become evident to any one who compares the two French Encyclopaedias, which may be regarded as the exponents of the reigning philosophy of the two great revolutionary eras. The first, the Encyclopedie of D’Alembert, Voltaire, and Diderot, sought to malign and extirpate Christianity, while it did frequent homage to Natural Theology; the second, the “Nouvelle Encyclopedie” of Pierre Leroux and his coadjutors, proclaims the deification of Humanity, and the dethronement of God!