If it were permitted to men to select a sign whereby they should know that a message came from the Supreme Being, probably the man of science would select for the sign the communication of some scientific fact beyond the knowledge of the day, but admitting of being readily put to the test. The evidence thus obtained in favour of a revelation would correspond in some sense to that depending on prophecies; but it would be more satisfactory to men having that particular mental bent which is called the scientific. Whether this turn of mind is inherent or the result of training, it certainly leads men of science to be more exacting in considering the value of evidence than any men, except perhaps lawyers. In the case of the student of science, St. Paul's statement that 'prophecies' 'shall fail' has been fulfilled, whereas it may be doubted whether evidence from 'knowledge' would in like manner 'vanish away.' On the contrary, it would grow stronger and stronger, as knowledge from observation, from experiment, and from calculation continually increased. It can scarcely be said that this has happened with such quasi-scientific statements as have actually been associated with revelation. If we regard St. Paul's reference to knowledge as relating to such statements as these, then nothing could be more complete than the fulfilment of his own prediction, 'Whether there be prophecies, they shall fail; whether there be tongues, they shall cease; whether there be knowledge, it shall vanish away.' The evidence from prophecies fails for the exact inquirer, who perceives the doubts which exist (among the most earnest believers) as to the exact meaning of the prophetic words, and even in some cases as to whether prophecies have been long since fulfilled or relate to events still to come. The evidence from 'tongues' has ceased, and those are dust who are said to have spoken in strange tongues. The knowledge which was once thought supernatural has utterly vanished away. But if, in the ages of faith, some of the results of modern scientific research had been revealed, as the laws of the solar system, the great principle of the conservation of energy, or the wave theory of light, or if some of the questions which still remain for men of science to solve had been answered in those times, the evidence for the student of science would have been irresistible. Of course he will be told that even then he would have hardened his heart; that the inquiry after truth tending naturally to depravity of mind, he would reject even evidence based on his beloved laws of probability; that his 'wicked and adulterous generation seeketh "in vain" after a sign,' and that if he will not accept Moses and the prophets, neither would he believe though one rose from the dead. Still the desire of the student of science to base his faith on convincing evidence (in a matter as important to him as to those who abuse him) does seem to have something reasonable in it after all. The mental qualities which cause him to be less easily satisfied than others, came to him in the same way as his bodily qualities; and even if the result to which his mental training leads him is as unfortunate as some suppose, that training is not strictly speaking so heinously sinful that nothing short of the eternal reprobation meted out to him by earthly judges can satisfy divine justice. So that it may be thought not a wholly unpardonable sin to speak of a sign which, had it been accorded, would have satisfied even the most exacting student of science. Apart, too, from all question of faith, the mere scientific interest of divinely inspired communications respecting natural laws and processes would justify a student of science in regarding them as most desirable messages from a being of superior wisdom and benevolence. If prophecies and tongues, why not knowledge, as evidence of a divine mission?
Such thoughts are suggested by the claim of some religious teachers to the possession of knowledge other than that which they could have gained by natural means. The claim has usually been quite honest. The teacher of religion tests the reality of his mission in simple à priori confidence that he has such a mission, and that therefore some one or other of the tests he applies will afford the required evidence. To one, says St. Paul, is given the word of wisdom; to another, the word of knowledge; to another, faith; to another, the gift of healing; to another, the working of miracles; to another, prophecy; to another, the discerning of spirits; to another, divers kinds of tongues: and so forth. If a man like Mahomet, who believes in his mission to teach, finds that he cannot satisfactorily work miracles—that mountains will not be removed at his bidding—then some other evidence satisfies him of the reality of his mission. Swedenborg, than whom, perhaps, no more honest man ever lived, said and believed that to him had been granted the discerning of spirits. 'It is to be observed,' he said, 'that a man may be instructed by spirits and angels if his interiors be so open as to enable him to speak and be in company with them, for man in his essence is a spirit, and is with spirits as to his interiors; so that he whose interiors are opened by the Lord may converse with them, as man with man. This privilege I have enjoyed daily now for twelve years.'
It indicates the fulness of Swedenborg's belief in this privilege that he did not hesitate to describe what the spirits taught him respecting matters which belong rather to science than to faith; though it must be admitted that probably he supposed there was small reason for believing that his statements could ever be tested by the results of scientific research. The objects to which his spiritual communications related were conveniently remote. I do not say this as desiring for one moment to suggest that he purposely selected those objects, and not others which might be more readily examined. He certainly believed in the reality of the communications he described. But possibly there is some law in things visionary, corresponding to the law of mental operation with regard to scientific theories; and as the mind theorises freely about a subject little understood, but cautiously where many facts have been ascertained, so probably exact knowledge of a subject prevents the operation of those illusions which are regarded as supernatural communications. It is in a dim light only that the active imagination pictures objects which do not really exist; in the clear light of day they can no longer be imagined. So it is with mental processes.
Probably there is no subject more suitable in this sense for the visionary than that of life in other worlds. It has always had an attraction for imaginative minds, simply because it is enwrapped in so profound a mystery; and there has been little to restrain the fancy, because so little is certainly known of the physical condition of other worlds. Recently, indeed, a somewhat sudden and severe check has been placed on the liveliness of imagination which had enabled men formerly to picture to themselves the inhabitants of other orbs in space. Spectroscopic analysis and exact telescopic scrutiny will not permit some speculations to be entertained which formerly met with favour. Yet even now there has been but a slight change of scene and time. If men can no longer imagine inhabitants of one planet because it is too hot, or of another because it is too cold, of one body because it is too deeply immersed in vaporous masses, or of another because it has neither atmosphere nor water, we have only to speculate about the unseen worlds which circle round those other suns, the stars; or, instead of changing the region of space where we imagine worlds, we can look backward to the time when planets now cold and dead were warm with life, or forward to the distant future when planets now glowing with fiery heat shall have cooled down to a habitable condition.
Swedenborg's imaginative mind seems to have fully felt the charm of this interesting subject. It was, indeed, because of the charm which he found in it, that he was readily persuaded into the belief that knowledge had been supernaturally communicated to him respecting it. 'Because I had a desire,' he says, 'to know if there are other earths, and to learn their nature and the character of their inhabitants, it was granted me by the Lord to converse and have intercourse with spirits and angels who had come from other earths, with some for a day, with some for a week, and with some for months. From them I have received information respecting the earths from and near which they are, the modes of life, customs and worship of their inhabitants, besides various other particulars of interest, all which, having come to my knowledge in this way, I can describe as things which I have seen and heard.'
It is interesting (psychologically) to notice how the reasoning which had convinced Swedenborg of the existence of other inhabited worlds is attributed by him to the spirits. 'It is well known in the other life,' he says, 'that there are many earths with men upon them; for there (that is, in the spiritual life) every one who, from a love of truth and consequent use, desires it, is allowed to converse with the spirits of other earths, so as to be assured that there is a plurality of worlds, and be informed that the human race is not confined to one earth only, but extends to numberless earths.... I have occasionally conversed on this subject with the spirits of our earth, and the result of our conversation was that a man of enlarged understanding may conclude from various considerations that there are many earths with human inhabitants upon them. For it is an inference of reason that masses so great as the planets are, some of which exceed this earth in magnitude, are not empty bodies, created only to be carried in their motion round the sun, and to shine with their scanty light for the benefit of one earth only; but that they must have a nobler use. He who believes, as every one ought to believe, that the Deity created the universe for no other end than the existence of the human race, and of heaven from it (for the human race is the seminary of heaven), must also believe that wherever there is an earth there are human inhabitants. That the planets which are visible to us, being within the boundary of our solar system, are earths, may appear from various considerations. They are bodies of earthy matter, because they reflect the sun's light, and when seen through the telescope appear, not as stars shining with a flaming lustre, but as earths, variegated with obscure spots. Like our earth, they are carried round the sun by a progressive motion, through the path of the Zodiac, whence they have years and seasons of the year, which are spring, summer, autumn, and winter; and they rotate upon their axes, which makes days, and times of the day, as morning, midday, evening, and night. Some of them also have satellites, which perform their revolutions about their globes, as the moon does about ours. The planet Saturn, as being farthest from the sun, has besides an immense luminous ring, which supplies that earth with much, though reflected, light. How is it possible for anyone acquainted with these facts, and who thinks from reason, to assert that such bodies are uninhabited?'
Remembering that this reasoning was urged by the spirits, and that during twelve years Swedenborg's interiors had been opened in such sort that he could converse with spirits from other worlds, it is surprising that he should have heard nothing about Uranus or Neptune, to say nothing of the zone of asteroids, or again, of planets as yet unknown which may exist outside the path of Neptune. He definitely commits himself, it will be observed, to the statement that Saturn is the planet farthest from the sun. And elsewhere, in stating where in these spiritual communications the 'idea' of each planet was conceived to be situated, he leaves no room whatever for Uranus and Neptune, and makes no mention of other bodies in the solar system than those known in his day. This cannot have been because the spirits from then unknown planets did not feel themselves called upon to communicate with the spirit of one who knew nothing of their home, for he received visitors from worlds in the starry heavens far beyond human ken. It would almost seem, though to the faithful Swedenborgian the thought will doubtless appear very wicked, that the system of Swedenborg gave no place to Uranus and Neptune, simply because he knew nothing about those planets. Otherwise, what a noble opportunity there would have been for establishing the truth of Swedenborgian doctrines by revealing to the world the existence of planets hitherto unknown. Before the reader pronounces this a task beneath the dignity of the spirits and angels who taught Swedenborg it will be well for him to examine the news which they actually imparted.
I may as well premise, however, that it does not seem to me worth while to enter here at any length into Swedenborg's descriptions of the inhabitants of other worlds, because what he has to say on this subject is entirely imaginative. There is a real interest for us in his ideas respecting the condition of the planets, because those ideas were based (though unconsciously) upon the science of his day, in which he was no mean proficient. And even where his mysticism went beyond what his scientific attainments suggested, a psychological interest attaches to the workings of his imagination. It is as curious a problem to trace his ideas to their origin as it sometimes is to account for the various phases of a fantastic dream, such a dream, for instance, as that which Armadale, the doctor, and Midwinter, in 'Armadale,' endeavour to connect with preceding events. But Swedenborg's visions of the behaviour and appearance of the inhabitants of other earths have little interest, because it is hopeless to attempt to account for even their leading features. For instance, what can we make of such a passage as the following, relating to the spirits who came from Mercury?—'Some of them are desirous to appear, not like the spirits of other earths as men, but as crystalline globes. Their desire to appear so, although they do not, arises from the circumstance that the knowledges of things immaterial are in the other life represented by crystals.'
Yet some even of these more fanciful visions significantly indicate the nature of Swedenborg's philosophy. One can recognise his disciples and his opponents among the inhabitants of various favoured and unhappy worlds, and one perceives how the wiser and more dignified of his spiritual visitors are made to advocate his own views, and to deride those of his adversaries. Some of the teachings thus circuitously advanced are excellent.
For instance, Swedenborg's description of the inhabitants of Mercury and their love of abstract knowledge contains an instructive lesson. 'The spirits of Mercury imagine,' he says, 'that they know so much, that it is almost impossible to know more. But it has been told them by the spirits of our earth, that they do not know many things, but few, and that the things which they know not are comparatively infinite, and in relation to those they do know are as the waters of the largest ocean to those of the smallest fountain; and further, that the first advance to wisdom is to know, acknowledge, and perceive that what we do know, compared with what we do not know, is so little as hardly to amount to anything.'[27] So far we may suppose that Swedenborg presents his own ideas, seeing that he is describing what has been told the Mercurial spirits by the spirits of our earth, of whom (during these spiritual conversations) he was one. But he proceeds to describe how angels were allowed to converse with the Mercurial spirits in order to convince them of their error. 'I saw another angel,' says he, after describing one such conversation, 'conversing with them; he appeared at some altitude to the right; he was from our earth, and he enumerated very many things of which they were ignorant.... As they had been proud on account of their knowledges, on hearing this they began to humble themselves. Their humiliation was represented by the sinking of the company which they formed, for that company then appeared as a volume or roll, ... as if hollowed in the middle and raised at the sides.... They were told what that signified, that is, what they thought in their humiliation, and that those who appeared elevated at the sides were not as yet in any humiliation. Then I saw that the volume was separated, and that those who were not in humiliation were remanded back towards their earth, the rest remaining.'