I speak here not of moral influences, which we know will pass over from time into eternity, but of a physical reaction, which may also reach beyond the same gulf. For at least a part of those creatures, who in this world have felt the modifying power of other beings, will survive the world’s final catastrophe, and occupy material, though spiritual bodies, whose germ is represented as derived from their bodies on earth. We have reason, then, to suppose some connection and modifying influence between them. And we might show, also, that moral causes, which so affect the physical character here, may exert a like power in eternity. But time will not permit the argument to be followed out.

The conclusion, then, from this argument also, is, that probably every action of ours on earth modifies the condition and destiny of every other created being in this and other worlds through time and eternity. What though human experience, dependent on the bluntness of mortal sensibilities, cannot demonstrate such an influence? Shall the gross perceptions of this disordered world be made the standard of all that exists? Rather let us listen to the suggestions of science, which tell us of the possibility of senses far more acute in other worlds, and in a future state of being—senses that can trace out and feel the vibrations of the delicate web of organic influence that binds together the great and the small, the past, the present, and the future, throughout the universe.

My seventh argument in support of the general principle depends upon mental reaction.

Mental reaction operates in two ways—indirectly and directly; indirectly through matter, directly by the influence of mind upon mind, without an intervening medium. When describing electric reactions, I have shown how our thoughts and volitions change the electric, chemical, and even mechanical condition of the body, and, through these media, that of all the material universe; and I need not repeat that argument. But to modify the inanimate world through these agencies necessarily affects all other intellects, which are connected with matter; and since man in a future world is to assume a spiritual body, we may reasonably suppose that all created beings are in some way connected with matter; and, therefore, by means of materialism, through the subtile agencies that have been named, we may be sure that an influence goes out from every thought and volition of ours, and reaches every other intellect in the wide creation. I know not whether, in other worlds, their inhabitants possess sensibilities acute enough to be conscious of this influence; certainly, in this world, it is only to a limited extent that men are conscious of it. Yet we must admit that it exists and acts, or deny the demonstrated verities of science.

But is there not evidence that mind sometimes acts directly upon other minds, without any gross, intervening media? It may, indeed, be doubted whether any created intellect operates, except in connection with some form of matter. Yet there are certain facts in the history of individuals in an abnormal state, which show that one mind acts upon another, independent of the senses, or any other material means or intercommunication discoverable by the senses. Take the details of sleep-waking, or somnambulism; and do not they present us with numerous cases in which impressions are made by one mind upon another, even when separated beyond the sphere of the senses? Take the facts respecting double consciousness, and those where the power was possessed of reading the thoughts, of others, or the facts relating to prevision; and surely they cannot be explained but by the supposition of a direct influence of one mind upon another.

Still more decided in this respect are the most familiar facts of artificial somnambulism, called mesmerism. Whatever may be our views of this unsettled branch of knowledge as a whole, it would seem as if we could not doubt that its facts prove the action of mind upon mind, independently of bodily organization, without rejecting evidence which would prove any thing else.

Now, if we admit that mind does operate upon other minds while we are in the body, independent of the body, can we tell how far the influence extends? If electricity, or some other subtile agent, be essential to this action, it would indeed transfer this example to electric reaction, but it would still be real. Yet, in the absence of all certain proof of the electric power in this case, and with certain proof of the existence of such an influence, we may place it among those marvellous means by which man makes an impression, wide beyond our present knowledge, upon the universe, material and mental; and it ought to make us feel that our lightest thoughts and feeblest volitions may reach the outer limit of intellectual life, and its consequences meet us in distant worlds, and far down the track of eternity.

Finally. I derive an argument in support of the general principle from geological reaction.

By this expression, I mean those reactions of whose existence geology furnishes the proof. They are, in fact, the reactions already considered; but geology proves that they have actually operated in past time in many instances, by evidence registered on the rocks, and thus tends to confirm our reasoning derived from other sources. I do not mean that the proof is before us of precisely such an action as our reasoning has supposed, but so analogous to that supposed as to lend it confirmation. A few examples will illustrate the argument.

The effects of mechanical reaction are, perhaps, most frequent and striking in the rocks, especially those deposited from water. Here we have, for instance, the ripple marks, which present us with a faithful register of the slightest movement of the waters, and also of the motions of the atmosphere, or of the currents in it, that agitated the waters. In the almost impalpable powder that sometimes constitutes the rocks, we can trace the slightest erosion and comminution of the strata from which the deposit was worn. In the petrified rain drops we find an indelible trace of the most gentle shower. And here, too, we can see the direction of the wind. Such facts, also, imply the operation of electricity and gravity, of heat and cold, collecting and condensing the rain, and bringing it down; and so similar to present meteorological phenomena do these ancient showers appear to have been, that we may conclude that electrical reactions, in all respects, were the same as at present.