In La Dégradation de l'énergie (ive partie, chap. xviii., 2) B. Brunhes relates a story concerning the great Catholic mathematician Cauchy, communicated to him by M. Sarrau, who had it from Père Gratry. While Cauchy and Père Gratry were walking in the gardens of the Luxumbourg, their conversation turned upon the happiness which those in heaven would have in knowing at last, without any obscurity or limitation, the truths which they had so long and so laboriously sought to investigate on earth. In allusion to the study which Cauchy had made of the mechanistic theory of the reflection of light, Père Gratry threw out the suggestion that one on the greatest intellectual joys of the great geometrician in the future life would be to penetrate into the secret of light. To which Cauchy replied that it did not appear to him to be possible to know more about this than he himself already knew, neither could he conceive how the most perfect intelligence could arrive at a clearer comprehension of the mystery of reflection than that manifested in his own explanation of it, seeing that he had furnished a mechanistic theory of the phenomenon. "His piety," Brunhes adds, "did not extend to a belief that God Himself could have created anything different or anything better."
From this narrative two points of interest emerge. The first is the idea expressed in it as to what contemplation, intellectual love, or beatific vision, may mean for men of a superior order of intelligence, men whose ruling passion is knowledge; and the second is the implicit faith shown in the mechanistic explanation of the world.
This mechanistic tendency of the intellect coheres with the well-known formula, "Nothing is created, nothing is lost, everything is transformed"—a formula by means of which it has been sought to interpret the ambiguous principle of the conservation of energy, forgetting that practically, for us, for men, energy is utilizable energy, and that this is continually being lost, dissipated by the diffusion of heat, and degraded, its tendency being to arrive at a dead-level and homogeneity. That which has value, and more than value, reality, for us, is the differential, which is the qualitative; pure, undifferentiated quantity is for us as if it did not exist, for it does not act. And the material Universe, the body of the Universe, would appear to be gradually proceeding—unaffected by the retarding action of living organisms or even by the conscious action of man—towards a state of perfect stability, of homogeneity (vide Brunhes, op. cit.) For, while spirit tends towards concentration, material energy tends towards diffusion.
And may not this have an intimate relation with our problem? May there not be a connection between this conclusion of scientific philosophy with respect to a final state of stability and homogeneity and the mystical dream of the apocatastasis? May not this death of the body of the Universe be the final triumph of its spirit, of God?
It is manifest that there is an intimate relation between the religious need of an eternal life after death and the conclusions—always provisional—at which scientific philosophy arrives with respect to the probable future of the material or sensible Universe. And the fact is that just as there are theologians of God and the immortality of the soul, so there are also those whom Brunhes calls (op. cit., chap. xxvi., § 2) theologians of monism, and whom it would perhaps be better to call atheologians, people who pertinaciously adhere to the spirit of a priori affirmation; and this becomes intolerable, Brunhes adds, when they harbour the pretension of despising theology. A notable type of these gentlemen may be found in Haeckel, who has succeeded in solving the riddles of Nature!
These atheologians have seized upon the principle of the conservation of energy, the "Nothing is created, nothing is lost, everything is transformed" formula, the theological origin of which is seen in Descartes, and have made use of it as a means whereby we are able to dispense with God. "The world built to last," Brunhes comments, "resisting all wear and tear, or rather automatically repairing the rents that appear in it—what a splendid theme for oratorical amplification! But these same amplifications which served in the seventeenth century to prove the wisdom of the Creator have been used in our days as arguments for those who presume to do without Him." It is the old story: so-called scientific philosophy, the origin and inspiration of which is fundamentally theological or religious, ending in an atheology or irreligion, which is itself nothing else but theology and religion. Let us call to mind the comments of Ritschl upon this head, already quoted in this work.
To-day the last word of science, or rather of scientific philosophy, appears to be that, by virtue of the degradation of energy, of the predominance of irreversible phenomena, the material, sensible world is travelling towards a condition of ultimate levelness, a kind of final homogeneity. And this brings to our mind the hypothesis, not only so much used but abused by Spencer, of a primordial homogeneity, and his fantastic theory of the instability of the homogeneous. An instability that required the atheological agnosticism of Spencer in order to explain the inexplicable transition from the homogeneous to the heterogeneous. For how, without any action from without, can any heterogeneity emerge from perfect and absolute homogeneity? But as it was necessary to get rid of every kind of creation, "the unemployed engineer turned metaphysician," as Papini called him, invented the theory of the instability of the homogeneous, which is more ... what shall I say? more mystical, and even more mythological if you like, than the creative action of God.
The Italian positivist, Roberto Ardigo, was nearer the mark when, objecting to Spencer's theory, he said that the most natural supposition was that things always were as they are now, that always there have been worlds in process of formation, in the nebulous stage, worlds completely formed and worlds in process of dissolution; that heterogeneity, in short, is eternal. Another way, it will be seen, of not solving the riddle.
Is this perhaps the solution? But in that case the Universe would be infinite, and in reality we are unable to conceive a Universe that is both eternal and limited such as that which served as the basis of Nietzsche's theory of eternal recurrence. If the Universe must be eternal, if within it and as regards each of its component worlds, periods in which the movement is towards homogeneity, towards the degradation of energy, must alternate with other periods in which the movement is towards heterogeneity, then it is necessary that the Universe should be infinite, that there should be scope, always and in each world, for some action coming from without. And, in fact, the body of God cannot be other than eternal and infinite.
But as far as our own world is concerned, its gradual levelling-down—or, we might say, its death—appears to be proved. And how will this process affect the fate of our spirit? Will it wane with the degradation of the energy of our world and return to unconsciousness, or will it rather grow according as the utilizable energy diminishes and by virtue of the very efforts that it makes to retard this degradation and to dominate Nature?—for this it is that constitutes the life of the spirit. May it be that consciousness and its extended support are two powers in contraposition, the one growing at the expense of the other?