How fine is this outburst of the great Scotch orator! He spoke as one inspired with prophetic foreknowledge; for in less than twenty years after this utterance, Beer and Mädler published their splendid Mappe Selenographica, or map of the moon; and photography offered its aid to the fuller delineation of our silvery satellite. Who can tell what the last fifteen years of this eventful century may develop in the same direction? Verily these intuitions of reason seem often favoured with an apocalypse of coming disclosures; and, if we may venture to adopt with slight alteration a sentence of Shelley, we will say: "It is impossible to read the compositions of the most celebrated writers of the present day without being startled with the electric life which burns within their words. They measure the circumference and sound the depths of nature with a comprehensive and all-penetrating spirit, and they are themselves perhaps the most sincerely astonished at its manifestations; for it is less their spirit than the spirit of the age." The poets of science, in their analogies, are "the hierophants of an unapprehended inspiration; the mirrors of the gigantic shadows which futurity casts upon the present." [461] Equally noble with the language of Chalmers is a paragraph which we have extracted from a work by that scholarly writer, Isaac Taylor. He says: "There are two facts, each of which is significant in relation to our present subject, and of which the first has long been understood, while the latter (only of late ascertained) is every day receiving new illustrations; namely, that our planet is, in no sense, of primary importance in the general system, or entitled, by its magnitude, or its position, or its constitution, to be considered as exerting any peculiar influence over others, or as the object of more regard than any others. This knowledge of our real place and value in the universe is a very important consequence of our modern astronomy, and should not be lost sight of in any of our speculations. But then it is also now ascertained that the great laws of our own planet, and of the solar system to which it belongs, prevail in all other and the most remote systems, so as to make the visible universe, in the strictest sense, ONE SYSTEM--indicating one origin and showing the presence of one Controlling Power. Thus the law of gravitation, with all the conditions it implies, and the laws of light, are demonstrated to be in operation in regions incalculably remote; and just so far as the physical constitution of the other planets of our system can be either traced, or reasonably conjectured, it appears that, amid great diversities of constitution, the same great principles prevail in all; and therefore our further conjecture concerning the existence of sentient and rational life in other worlds is borne out by every sort of analogy, abstract and physical; and this same rule of analogy impels us to suppose that rational and moral agents, in whatever world found, and whatever diversity of form may distinguish them, would be such that we should soon feel at home in their society, and able to confer with them, to communicate knowledge to them, and to receive knowledge from them. Neither truth nor virtue is local; nor can there be wisdom and goodness in one planet, which is not wisdom and goodness in every other." [462] The writer of the Plurality of Worlds, a little work distinct from the essay already quoted, vigorously vindicates "the deeply cherished belief of some philosophers, and of many Christians, that our world, in its present state, contains the mere embryo of intelligent, moral, and religious happiness; that the progress of man in his present state is but the initiation of an interminable career of glory; and that his most widely extended associations are a preparation for as interminably an intercourse with the whole family of an intelligent universe." [463] Dr. Arnott may add a final word, a last link in this evidential chain of analogy. He writes: "To think, as our remote forefathers did, that the wondrous array of the many planets visible from this earth serve no purpose but to adorn its nocturnal sky, would now appear absurd indeed; but whether they are inhabited by beings at all resembling the men of this earth, we have not the means of knowing. All the analogies favour the opinion that they are the abodes of life and its satisfactions. On this earth there is no place so hot or so cold, so illumined or so dark, so dry or so wet, but that it has creatures constituted to enjoy life there." [464]
Here our long list of learned authorities shall terminate. We have strung together a large number of citations, and have ourselves furnished only the string. Indeed, what more have amateurs that they can do? For, as Pope puts it,--
"Who shall decide, when doctors disagree,
And soundest casuists doubt, like you and me?"
Besides, astronomy is no child's play, nor are its abstruse problems to be mastered by superficial meddlers. "Its intricacy," as Narrien reminds us, "in the higher departments, is such as to render the processes unintelligible to all but the few distinguished persons who, by nature and profound application to the subject, are qualified for such researches." [465] But if professionals must be summoned as witnesses, ordinary men may sit as jurors. This function we have wished to fufil; and we avow ourselves considerably perplexed, though not in despair. We hoped that after a somewhat exhaustive examination, we might be able to state the result with an emphasis of conviction. This we find impossible; but we can affirm on which side the evidence appears to preponderate, and whither, we rest assured, further light will lead our willing feet. The conclusion, therefore, of the whole matter is: we cannot see any living creatures on the moon, however long we strain our eyes. No instrument has yet been constructed that will reveal the slightest vestige of inhabitation. Consequently, the actual evidence of sense is all against us, and we resign it without demur. This point, being settled, is dismissed.
Next, we reconsider the results of scientific study, and are strongly inclined to think the weight of testimony favours the existence of a thin atmosphere, at least some water, and a measure of light and shade in succession. These conditions must enable vegetables and animals to exist upon its surface, though their constitution is in all probability not analogous with that of those which are found upon our earth. But to deny the being of inhabitants of some kind, even in the absence of these conditions, we submit would be unphilosophical, seeing that the Power which adapted terrestrial life to terrestrial environments could also adapt lunar life to the environments in the moon. We are seeking no shelter in the miraculous, nor do we run from a dilemma to the refuges of religion. Apart from our theological belief in the potency of the Creator and Controller of all worlds, we simply regard it as illogical and inconclusive to argue that because organization, life, and intelligence obtain within one sphere under one order of circumstances, therefore the same order obtains in every other sphere throughout the system to which that one belongs. The unity of nature is as clear to us as the unity of God; but unity is not uniformity. We view the whole creation as we view this world; the entire empire as we view this single province,
"Where order in variety we see,
And where, though all things differ, all agree."
And, finally, as analogy is unreservedly on the side of the occupation of every domain in creation, by some creatures who have the dominion, we cannot admit the probability that the earth is the only tenement with tenants: we must be confirmed in our judgment that the sun and the planets, with their moons, ours of course included, are neither blank nor barren, but abodes of variously organized beings, fitted to fulfil the chief end of all noble existence: the enjoyment of life, the effluence of love, the good of all around and the glory of God above.
This article, that the moon is inhabited, may therefore form a clause of our scientific creed; not to be held at any hazard, as a matter of life or death, or a test of communion, but to be maintained subject to corrections such as future elucidation may require. We believe that we are justified by science, reason, and analogy; and confidently look to be further justified by verification. We accept many things as matters of faith, which we have not fully ascertained to be matters of fact; but "faith is the assurance of things hoped for, the proving of things not seen." By double entry the books of science are kept, by reasoning and demonstration: when future auditors shall examine the accounts of the moon's inhabitation, we are persuaded that the result of our reckoning will be found to be correct.
If any would charge us with a wish to be wise above what is written, we merely reply: There are unwritten revelations which are nevertheless true. Besides, we are not sure that at least an intimation of other races than those of the earth is not already on record. Not to prove any position, but to check obstructive criticism, we refer to the divine who is said to have witnessed in magnificent apocalypse some closing scenes of the human drama. If he also heard in sublime oratorio a prelude of this widely extended glory, our vision may not be a "baseless fabric." After the quartettes of earth, and the interludes of angels, came the grand finale, when every creature which is in heaven, as well as on the earth, was heard ascribing "Blessing and honour and glory and power to Him who sitteth upon the throne." Assuredly, our conception of a choir worthy to render that chorus is not of an elect handful of "saints," or contracted souls, embraced within any Calvinistic covenant, but of an innumerable multitude of ennobled, purified, and expanded beings, convoked from every satellite and planet, every sun and star, and overflowing with gratitude and love to that universal Father of lights, with whom is no parallax, nor descension, and who kindled every spark of life and beauty that in their individual and combined lustre He might reflect and repeat His own ineffable blessedness.