Hints towards the formation of a more comprehensive theory of life/The Nature of Life/Part 3
If it were asked, to what purpose or with what view we should generalize the idea of Life thus broadly, I should not hesitate to reply that, were there no other use conceivable, there would be some advantage in merely destroying an arbitrary assumption in natural philosophy, and in reminding the physiologists that they could not hear the life of metals asserted with a more contemptuous surprise than they themselves incur from the vulgar, when they speak of the Life in mould or mucor. But this is not the case. This wider view not only precludes a groundless assumption, it likewise fills up the arbitrary chasm between physics and physiology, and justifies us in using the former as means of insight into the latter, which would be contrary to all sound rules of ratiocination if the powers working in the objects of the two sciences were absolutely and essentially diverse. For as to abstract the idea of kind from that of degrees, which are alone designated in the language of common use, is the first and indispensable step in philosophy, so are we the better enabled to form a notion of the kind, the lower the degree, and the simpler the form is in which it appears to us. We study the complex in the simple; and only from the intuition of the lower can we safely proceed to the intellection of the higher degrees. The only danger lies in the leaping from low to high, with the neglect of the intervening gradations. But the same error would introduce discord into the gamut, et ab abusu contra usum non valet consequentia. That these degrees will themselves bring forth secondary kinds sufficiently distinct for all the purposes of science, and even for common sense, will be seen in the course of this inquisition: for this is one proof of the essential vitality of nature, that she does not ascend as links in a suspended chain, but as the steps in a ladder; or rather she at one and the same time ascends as by a climax, and expands as the concentric circles on the lake from the point to which the stone in its fall had given the first impulse. At all events, a contemptuous rejection of this mode of reasoning would come with an ill grace from a medical philosopher, who cannot combine any three phenomena of health or of disease without the assumption of powers, which he is compelled to deduce without being able to demonstrate; nay, even of material substances as the vehicles of these powers, which he can never expect to exhibit before the senses.
From the preceding it should appear, that the most comprehensive formula to which life is reducible, would be that of the internal copula of bodies, or (if we may venture to borrow a phrase from the Platonic school) the power which discloses itself from within as a principle of unity in the many. But that there is a physiognomy in words, which, without reference to their fitness or necessity, make unfavorable as well as favorable impressions, and that every unusual term in an abstruse research incurs the risk of being denominated jargon, I should at the same time have borrowed a scholastic term, and defined life absolutely, as the principle of unity in multeity, as far as the former, the unity to wit, is produced ab intra; but eminently (sensu eminenti), I define life as the principle of individuation, or the power which unites a given all into a whole that is presupposed by all its parts. The link that combines the two, and acts throughout both, will, of course, be defined by the tendency to individuation. Thus, from its utmost latency, in which life is one with the elementary powers of mechanism, that is, with the powers of mechanism considered as qualitative and actually synthetic, to its highest manifestation, (in which, as the vis vitæ vivida, or life as life, it subordinates and modifies these powers, becoming contra-distinguished from mechanism, ab extra, under the form of organization,) there is an ascending series of intermediate classes, and of analogous gradations in each class. To a reflecting mind, indeed, the very fact that the powers peculiar to life in living animals include cohesion, elasticity, &c. (or, in the words of a late publication, "that living matter exhibits these physical properties,") would demonstrate that, in the truth of things, they are homogeneous, and that both the classes are but degrees and different dignities of one and the same tendency. For the latter are not subjected to the former as a lever, or walking-stick to the muscles; the more intense the life is, the less does elasticity, for instance, appear as elasticity. It sinks down into the nearest approach to its physical form by a series of degrees from the contraction and elongation of the irritable muscle to the physical hardness of the insensitive nail. The lower powers are assimilated, not merely employed, and assimilation presupposes the homogeneous nature of the thing assimilated; else it is a miracle, only not the same as that of a creation, because it would imply that additional and equal miracle of annihilation. In short, all the impossibilities which the acutest of the reformed Divines have detected in the hypothesis of transubstantiation would apply, totidem verbis et syllabis, to that of assimilation, if the objects and the agents were really heterogeneous. Unless, therefore, a thing can exhibit properties which do not belong to it, the very admission that living matter exhibits physical properties, includes the further admission, that those physical or dead properties are themselves vital in essence, really distinct but in appearance only different; or in absolute contrast with each other.
In all cases that which, abstractly taken, is the definition of the kind, will, when applied absolutely, or in its fullest sense, be the definition of the highest degree of that kind. If life, in general, be defined vis ab intra, cujus proprium est coadunare plura in rem unicam, quantùm est res unica; the unity will be more intense in proportion as it constitutes each particular thing a whole of itself; and yet more, again, in proportion to the number and interdependence of the parts, which it unites as a whole. But a whole composed, ab intra, of different parts, so far interdependent that each is reciprocally means and end, is an individual, and the individuality is most intense where the greatest dependence of the parts on the whole is combined with the greatest dependence of the whole on its parts; the first (namely, the dependence of the parts on the whole) being absolute; the second (namely, the dependence of the whole on its parts) being proportional to the importance of the relation which the parts have to the whole, that is, as their action extends more or less beyond themselves. For this spirit of the whole is most expressed in that part which derives its importance as an End from its importance as a Mean, relatively to all the parts under the same copula.
Finally, of individuals, the living power will be most intense in that individual which, as a whole, has the greatest number of integral parts presupposed in it; when, moreover, these integral parts, together with a proportional increase of their interdependence, as parts, have themselves most the character of wholes in the sphere occupied by them. A mathematical point, line, or surface, is an ens rationis, for it expresses an intellectual act; but a physical atom is ens fictitium, which may be made subservient, as ciphers are in arithmetic, to the purposes of hypothetical construction, per regulam falsi; but transferred to Nature, it is in the strictest sense an absurd quantity; for extension, and consequently divisibility, or multeity, (for space cannot be divided,) is the indispensable condition, under which alone anything can appear to us, or even be thought of, as a thing. But if it should be replied, that the elementary particles are atoms not positively, but by such a hardness communicated to them as is relatively invincible, I should remind the assertor that temeraria citatio supernaturalium est pulvinar intellectûs pigri, and that he who requires me to believe a miracle of his own dreaming, must first work a miracle to convince me that he had dreamt by inspiration. Add, too, the gross inconsistency of resorting to an immaterial influence in order to complete a system of materialism, by the exclusion of all modes of existence which the theorist cannot in imagination, at least, finger and peep at! Each of the preceding gradations, as above defined, might be represented as they exist, and are realised in Nature. But each would require a work for itself, co-extensive with the science of metals, and that of fossils (both as geologically applied); of crystallization; and of vegetable and animal physiology, in all its distinct branches. The nature of the present essay scarcely permits the space sufficient to illustrate our meaning. The proof of its probability (for to that only can we arrive by so partial an application of the hypothesis), is to be found in its powers of solving the particular class of phenomena, that form the subjects of the present inquisition, more satisfactorily and profitably than has been done, or even attempted before.
Exclusively, therefore, for the purposes of illustration, I would take as an instance of the first step, the metals, those, namely, that are capable of permanent reduction. For, by the established laws of nomenclature, the others (as sodium, potassium, calcium, silicium, &c.) would be entitled to a class of their own, under the name of bases. It is long since the chemists have despaired of decomposing this class of bodies. They still remain, one and all, as elements or simple bodies, though, on the principles of the corpuscularian philosophy, nothing can be more improbable than that they really are such; and no reason has or can be assigned on the grounds of that system, why, in no one instance, the contrary has not been proved. But this is at once explained, if we assume them as the simplest form of unity, namely, the unity of powers and properties. For these, it is evident, may be endlessly modified, but can never be decomposed. If I were asked by a philosopher who had previously extended the attribute of Life to the Byssus speciosa, and even to the crustaceous matter, or outward bones of a lobster, &c., whether the ingot of gold expressed life, I should answer without hesitation, as the ingot of gold assuredly not, for its form is accidental and ab extra. It may be added to or detracted from without in the least affecting the nature, state, or properties in the specific matter of which the ingot consists. But as gold, as that special union of absolute and of relative gravity, ductility, and hardness, which, wherever they are found, constitute gold, I should answer no less fearlessly, in the affirmative. But I should further add, that of the two counteracting tendencies of nature, namely, that of detachment from the universal life, which universality is represented to us by gravitation, and that of attachment or reduction into it, this and the other noble metals represented the units in which the latter tendency, namely, that of identity with the life of nature, subsisted in the greatest overbalance over the former. It is the form of unity with the least degree of tendency to individuation.
Rising in the ascent, I should take, as illustrative of the second step, the various forms of crystals as a union, not of powers only, but of parts, and as the simplest forms of composition in the next narrowest sphere of affinity. Here the form, or apparent quantity, is manifestly the result of the quality, and the chemist himself not seldom admits them as infallible characters of the substances united in the whole of a given crystal.
In the first step, we had Life, as the mere unity of powers; in the second we have the simplest forms of totality evolved. The third step is presented to us in those vast formations, the tracing of which generically would form the science of Geology, or its history in the strict sense of the word, even as their description and diagnostics constitute its preliminaries.
Their claim to this rank I cannot here even attempt to support. It will be sufficient to explain my reason for having assigned it to them, by the avowal, that I regard them in a twofold point of view: 1st, as the residue and product of vegetable and animal life; 2d, as manifesting the tendencies of the Life of Nature to vegetation or animalization. And this process I believe—in one instance by the peat morasses of the northern, and in the other instance by the coral banks of the southern hemisphere—to be still connected with the present order of vegetable and animal Life, which constitute the fourth and last step in these wide and comprehensive divisions.
In the lowest forms of the vegetable and animal world we perceive totality dawning into individuation, while in man, as the highest of the class, the individuality is not only perfected in its corporeal sense, but begins a new series beyond the appropriate limits of physiology. The tendency to individuation, more or less obscure, more or less obvious, constitutes the common character of all classes, as far as they maintain for themselves a distinction from the universal life of the planet; while the degrees, both of intensity and extension, to which this tendency is realized, form the species, and their ranks in the great scale of ascent and expansion.
In the treatment of a subject so vast and complex, within the limits prescribed for an essay like the present, where it is impossible not to say either too much or too little (and too much because too little), an author is entitled to make large claims on the candour of his judges. Many things he must express inaccurately, not from ignorance or oversight, but because the more precise expression would have involved the necessity of a further explanation, and this another, even to the first elements of the science. This is an inconvenience which presses on the analytic method, on however large a scale it may be conducted, compared with the synthetic; and it must bear with a tenfold weight in the present instance, where we are not permitted to avail ourselves of its usual advantages as a counterbalance to its inherent defects. I shall have done all that I dared propose to myself, or that can be justly demanded of me by others, if I have succeeded in conveying a sufficiently clear, though indistinct and inadequate notion, so as of its many results to render intelligible that one which I am to apply to my particular subject, not as a truth already demonstrated, but as an hypothesis, which pretends to no higher merit than that of explaining the particular class of phenomena to which it is applied, and asks no other reward than a presumption in favour of the general system of which it affirms itself to be a dependent though integral part. By Life I everywhere mean the true Idea of Life, or that most general form under which Life manifests itself to us, which includes all its other forms. This I have stated to be the tendency to individuation, and the degrees or intensities of Life to consist in the progressive realization of this tendency. The power which is acknowledged to exist, wherever the realization is found, must subsist wherever the tendency is manifested. The power which comes forth and stirs abroad in the bird, must be latent in the egg. I have shown, moreover, that this tendency to individuate cannot be conceived without the opposite tendency to connect, even as the centrifugal power supposes the centripetal, or as the two opposite poles constitute each other, and are the constituent acts of one and the same power in the magnet. We might say that the life of the magnet subsists in their union, but that it lives (acts or manifests itself) in their strife. Again, if the tendency be at once to individuate and to connect, to detach, but so as either to retain or to reproduce attachment, the individuation itself must be a tendency to the ultimate production of the highest and most comprehensive individuality. This must be the one great end of Nature, her ultimate object, or by whatever other word we may designate that something which bears to a final cause the same relation that Nature herself bears to the Supreme Intelligence.
- Thus we may say that whatever is organized from without, is a product of mechanism; whatever is mechanised from within, is a production of organization.
- "The matter that surrounds us is divided into two great classes, living and dead; the latter is governed by physical laws, such as attraction, gravitation, chemical affinity; and it exhibits physical properties, such as cohesion, elasticity, divisibility, &c. Living matter also exhibits these properties, and is subject, in great measure, to physical laws. But living bodies are endowed moreover with a set of properties altogether different from these, and contrasting with them very remarkably." (Vide Lawrence's Lectures, p. 121.)
- Much against my will I repeat this scholastic term, multeity, but I have sought in vain for an unequivocal word of a less repulsive character, that would convey the notion in a positive and not comparative sense in kind, as opposed to the unum et simplex, not in degree, as contracted with the few. We can conceive no reason that can be adduced in justification of the word caloric, as invented to distinguish the external cause of the sensation heat, which would not equally authorise the introduction of a technical term in this instance.