The first theory which suggests itself and which on the surface seems rather attractive is that of spiritualism, which may be extended until it is scarcely distinguishable from the theosophical theory and other religious suppositions. It assumes the revival of spirits, the existence of discarnate or other superior and more mysterious entities which surround us, interest themselves in our fate, guide our thoughts and our actions and, above all, know the future. It is, as we recognized when speaking of ghosts and hanted houses, a very acceptable theory; and any one to whom it appears can adopt it without doing violence to his intelligence. But we must confess that it seems less necessary and perhaps even less clearly proved in this region than in that. It starts by begging the question: without the intervention of discarnate beings, the spiritualists say, it is impossible to explain the majority of the premonitory phenomena; therefore we must admit the existence of these discarnate beings. Let us grant it for the moment, for to beg the question, which is merely an indefensible trick of the superficial logic of our brain, does not necessarily condemn a theory and neither takes away from nor adds to the reality of things. Besides, as we shall insist later, the intervention or non-intervention of the spirits is not the point at issue; and the crux of the mystery does not lie there. What most interest us is far less the paths or intermediaries by which prophetic warnings reach us than the actual existence of the future in the present. It is true--to do complete justice to neospiritualism--that its position offers certain advantages from the point of view of the almost inconceivable problem of the preexistence of the future. It can evade or divert some of the consequences of that problem. The spirits, it declares, do not necessarily see the future as a whole, as a total past or present, motionless and immovable, but they know infinitely better than we do the numberless causes that determine any agent, so that, finding themselves at the luminous source of those causes, they have no difficulty in foreseeing their effects. They are, with respect to the incidents still in process of formation, in the position of an astronomer who foretells, within a second, all the phases of an eclipse in which a savage sees nothing but an unprecedented catastrophe which he attributes to the anger of his idols of straw or clay. It is indeed possible that this acquaintance with a greater number of causes explains certain predictions; but there are plenty of others which presume a knowledge of so many causes, causes so remote and so profound, that this knowledge is hardly to be distinguished from a knowledge of the future pure and simple. In any case, beyond certain limits, the preexistence of causes seems no clearer than that of effects. Nevertheless, it must be admitted that the spiritualists gain a slight advantage here.