Not less impossible, in the light of pure reason, do we find the anthropistic myth of the “last judgment,” and the separation of the souls of men into two great groups, of which one is destined for the eternal joys of Paradise and the other for the eternal torments of hell—and that from a personal God who is called the “Father of Love”! And it is this “Universal Father” who has himself created the conditions of heredity and adaptation, in virtue of which the elect, on the one side, were bound to pursue the path towards eternal bliss, and the luckless poor and miserable, on the other hand, were driven into the paths of the damned?
A critical comparison of the countless and manifold fantasies which belief in immortality has produced during the last few thousand years in the different races and religions yields a most remarkable picture. An intensely interesting presentation of it, based on most extensive original research, may be found in Adalbert Svoboda’s distinguished works, The Illusion of the Soul and Forms of Faith. However absurd and inconsistent with modern knowledge most of these myths seem to be, they still play an important part, and, as “postulates of practical reason,” they exercise a powerful influence on the opinions of individuals and on the destiny of races.
The idealist and spiritualist philosophy of the day will freely grant that these prevalent materialistic forms of belief in immortality are untenable; it will say that the refined idea of an immaterial soul, a Platonic “idea” or a transcendental psychic substance, must be substituted for them. But modern realism can have nothing whatever to do with these incomprehensible notions; they satisfy neither the mind’s feeling of causality nor the yearning of our emotions. If we take a comprehensive glance at all that modern anthropology, psychology, and cosmology teach with regard to athanatism, we are forced to this definite conclusion: “The belief in the immortality of the human soul is a dogma which is in hopeless contradiction with the most solid empirical truths of modern science.”
[CHAPTER XII]
THE LAW OF SUBSTANCE
The Fundamental Chemical Law of the Constancy of Matter—The Fundamental Physical Law of the Conservation of Energy—Combination of Both Laws in the Law of Substance—The Kinetic, Pyknotic, and Dualistic Ideas of Substance—Monism of Matter—Ponderable Matter—Atoms and Elements—Affinity of the Elements—The Soul of the Atom (Feeling and Inclination)—Existence and Character of Ether—Ether and Ponderable Matter—Force and Energy—Potential and Actual Force—Unity of Natural Forces—Supremacy of the Law of Substance
The supreme and all-pervading law of nature, the true and only cosmological law, is, in my opinion, the law of substance; its discovery and establishment is the greatest intellectual triumph of the nineteenth century, in the sense that all other known laws of nature are subordinate to it. Under the name of “law of substance” we embrace two supreme laws of different origin and age—the older is the chemical law of the “conservation of matter,” and the younger is the physical law of the “conservation of energy.”[23] It will be self-evident to many readers, and it is acknowledged by most of the scientific men of the day, that these two great laws are essentially inseparable. This fundamental thesis, however, is still much contested in some quarters, and we must proceed to furnish the proof of it. But we must first devote a few words to each of the two laws.
The law of the “persistence” or “indestructibility of matter,” established by Lavoisier in 1789, may be formulated thus: The sum of matter, which fills infinite space, is unchangeable. A body has merely changed its form, when it seems to have disappeared. When coal burns, it is changed into carbonic-acid gas by combination with the oxygen of the atmosphere; when a piece of sugar melts in water, it merely passes from the solid to the fluid condition. In the same way, it is merely a question of change of form in the cases where a new body seems to be produced. A shower of rain is the moisture of the atmosphere cast down in the form of drops of water; when a piece of iron rusts, the surface layer of the metal has combined with water and with atmospheric oxygen, and formed a “rust,” or oxyhydrate of iron. Nowhere in nature do we find an example of the production, or “creation,” of new matter; nowhere does a particle of existing matter pass entirely away. This empirical truth is now the unquestionable foundation of chemistry; it may be directly verified at any moment by means of the balance. To the great French chemist Lavoisier belongs the high merit of first making this experiment with the balance. At the present day the scientist, who is occupied from one end of the year to the other with the study of natural phenomena, is so firmly convinced of the absolute “constancy” of matter that he is no longer able to imagine the contrary state of things.
We may formulate the “law of the persistence of force” or “conservation of energy” thus: The sum of force, which is at work in infinite space and produces all phenomena, is unchangeable. When the locomotive rushes along the line, the potential energy of the steam is transformed into the kinetic or actual energy of the mechanical movement; when we hear its shrill whistle, as it speeds along, the sound-waves of the vibrating atmosphere are conveyed through the tympanum and the three bones of the ear into the inner labyrinth, and thence transferred by the auditory nerve to the acoustic ganglionic cells which form the centre of hearing in the temporal lobe of the gray bed of the brain. The whole marvellous panorama of life that spreads over the surface of our globe is, in the last analysis, transformed sunlight. It is well known how the remarkable progress of technical science has made it possible for us to convert the different physical forces from one form to another; heat may be changed into molar movement, or movement of mass; this in turn into light or sound, and then into electricity, and so forth. Accurate measurement of the quantity of force which is used in this metamorphosis has shown that it is “constant” or unchanged. No particle of living energy is ever extinguished; no particle is ever created anew. Friedrich Mohr, of Bonn, was very near to the discovery of this great fact in 1837, but the discovery was actually made by the able Swabian physician, Robert Mayer, of Heilbronn, in 1842. Independently of Mayer, however, the principle was reached almost at the same time by the famous physiologist, Hermann Helmholtz; five years afterwards he pointed out its general application to, and fertility in, every branch of physics. We ought to say to-day that it rules also in the entire province of physiology—that is, of “organic physics”; but on that point we meet a strenuous opposition from the vitalistic biologists and the dualist and spiritualist philosophers. For these the peculiar “spiritual forces” of human nature are a group of “free” forces, not subject to the law of energy; the idea is closely connected with the dogma of the “freedom of the will.” We have, however, already seen ([p. 204]) that the dogma is untenable. Modern physics draws a distinction between “force” and “energy,” but our general observations so far have not needed a reference to it.
The conviction that these two great cosmic theorems, the chemical law of the persistence of matter and the physical law of the persistence of force, are fundamentally one, is of the utmost importance in our monistic system. The two theories are just as intimately united as their objects—matter and force or energy. Indeed, this fundamental unity of the two laws is self-evident to many monistic scientists and philosophers, since they merely relate to two different aspects of one and the same object, the cosmos. But, however natural the thought may be, it is still very far from being generally accepted. It is stoutly contested by the entire dualistic philosophy, vitalistic biology, and parallelistic psychology; even, in fact, by a few (inconsistent) monists, who think they find a check to it in “consciousness,” in the higher mental activity of man, or in other phenomena of our “free mental life.”