What, then, makes a man what he is? It is the fact of consciousness, the fact which marks him off from all other things with a deep line of separation. It is this and this alone, Ferrier says, this 'human phenomenon,' and not its objects, passions, or emotions, which leads us into pastures fresh and far separated from the dreary round which the old metaphysicians followed. The same discovery, of course, is always being made, though to Ferrier it was new; we are always straying into devious ways, ways that lead us into grey regions of abstraction, and we always want to be called back to the concrete and the real, to the freshness and the brightness of life as it is and lives.
Ferrier from this time onwards, from his youth until his death, kept one definite aim in view: the object of his life was to insist with all his might that our interests must be concentrated on man as he is as man, and not on a mere sum-total of passions and sensations by which the human being is affected. The consciousness of a state of mind is very different from that state of mind itself, and the two must be kept absolutely distinct. 'Let mind have the things which are mind's, and man the things which are man's.' We should, Ferrier says, fling 'mind' and its lumber overboard, busy ourselves with the man and his facts. Man's passions and sensations may be referred to 'mind' indeed, but he cannot lay his hands upon the fact of consciousness. That fact cannot be conceived of as vested in the object called the 'human mind,' an object being something really or ideally different from ourselves. In speaking of 'my mind,' mind may be what it chooses, but the consciousness is in the ego; and mind is really destitute of consciousness, otherwise the ego would necessarily be present in it. The dilemma is as follows: 'Unless the philosophers of mind attribute consciousness to mind, they leave out of view the most important phenomena of man; and if they attribute consciousness to mind, they annihilate the object of their research, in so far as the whole extent of this fact is concerned.'
Since Ferrier's time this point has been worked out very fully, and by none more successfully than by an English philosopher, Professor T. H. Green of Oxford, in his Introduction to the works of Hume. But when Ferrier wrote, his ideas were new; in England at least he was breaking up ground hitherto untouched, and therefore the debt of gratitude we owe him is not small, especially when we consider the forces against which he warred. 'Common-sense,' the solution offered for all philosophic difficulties, is really the problem of philosophy, and to speak of the 'philosophy of common-sense' is simply to confuse the problem with its solution. Common-sense, or rather what is given by its means, has simply to be construed into intelligible forms: in itself it makes no attempt to solve the difficulties that present themselves, and it is folly to suggest its doing so. When a man speaks of my sensations or my states of mind, he means something of which he—as consciousness—is independent, and which can be made an object to him. Were it not so, of course he could not possibly arrive at freedom, but would merely be the helpless child of destiny; and, as Ferrier points out, were consciousness and sensation one, consciousness would not have the power, undoubtedly possessed by it, of 'recovering the balance' that it loses on experiencing pain or passion; the return of consciousness, as he puts it, 'lowers the temperature' of the sensation or the passion, and the man regains the personality that for the time had almost vanished. A man, he tells us, can hardly even be said to be the 'victim' of his mind, and irresponsible—i.e., man stands aloof from the modifications which may visit him, therefore we should study him as he is, and not merely these 'states of mind' common to him and to animals alike. And consciousness must be active, exercising itself upon those states, and thereby realising human freedom.
Philosophy, then, is the gospel of freedom as contrasted with the bondage of the physical kingdom. But we are in subjection at the first, and all our lifetime a constant fight is being carried on. Philosophy paints its grey in grey, another great philosopher has told us, only when the freshness and life of youth has gone: the reconciliation is in the ideal, not the actual world. And so with Ferrier: 'The flowers of thy happiness,' says he, 'are withered. They could not last; they gilded but for a day the opening portals of life. But in their place I will give thee freedom's flowers. To act according to thy inclination may be enjoyment; but know that to act against it is liberty, and thou only actest thus because thou art really free.' Great and weighty words, which might be pondered by many more than those to whom they were originally addressed.
Having established his fundamental principles, Ferrier goes on to trace the birth of self-consciousness in the child—the knowledge of itself as 'I,' which means the knowledge of good and evil—the moral birth. Perception, again, is a synthesis of sensation and consciousness—the realisation of self in conjunction with the sensation experienced: it is, of course, peculiar to man. Things can only take effect on 'me' when there is a 'me' to take effect upon, and not at birth, or before I come to consciousness. Consciousness is the very essence and origin of the ego; without consciousness no man would be 'I.' It is our refusal to be acted on by outside impressions that constitutes our personality and perception of them; our communication with the universe is the communication of non-communication. And the ego is not something which comes into the world ready-made; it is a living activity which is never passive, for were it passive, it would be annihilated; in submitting to the action of causality its life would be gone. Our destiny is to free ourselves from the bonds of nature, from that 'blessed state of primeval innocence,' the blessedness, after all, of bondage. A man cannot be until he acts, for his Being arises out of his actions: consciousness being an act, our proper existence is the consequence of that act. His natural condition for others, and before he comes to existence, Ferrier says, is given, while his existence for himself is made by his thinking himself. It is only in the latter case that he can attain to Liberty, instead of remaining bound by the bonds imposed upon him by Necessity. The three great moments of humanity are: first, the natural or given man in enslaved Being; second, the conscious man in action working into freedom against passion; third, the 'I': man as free, that is, real personal Being.
Philosophy has thus a great future before her. Instead of being a mere dead theory as heretofore, she becomes renovated into a new life when she gets her proper place; she is separated from her supposed connection with the physical world, and is recognised as consciousness. When this is so, she loses her merely theoretic aspect, and is identified with the living practical interests of mankind. The dead symbols become living realities, the dead twigs are clothed with verdure. 'Know thyself, and in knowing thyself thou shalt see that this self is not thy true self; but, in the very act of knowing this, thou shalt at once displace this false self, and establish thy true self in its room.' And Ferrier goes on to trace the bearings of his theories in the moral and intellectual world. He finds in morality something more than a refined self-love; he finds the dawning will endeavouring to assert itself, to break free from the trammels imposed upon it by nature. Freedom, the great end of man, is contravened by the passive conditions of his nature; these are therefore wrong, and every act of resistance tends to the accomplishment of the one important end, which is to procure his liberty.
This essay, or series of essays, gives the keynote to Ferrier's thought and writings, therefore it seemed worth while to consider its argument in detail. The completeness of the break with the old philosophy is manifest. The 'scientific' methods applied to every region of knowledge were then in universal use, and no little courage was required to challenge their pretensions as they were challenged by Ferrier. But in courage, as we know, Ferrier was never lacking. His mind once made up, he had no fear in making his opinions known. He considered that the Scottish Philosophy had become something very like materialism in the hands of Brown and others, and he believed that the whole point of view must be changed if a really spiritual philosophy was to take its place. There may be traces of the impetuosity of youth in this attack: much working out was undoubtedly required before it could be said that a system had been established. But all the same this essay is a brilliant piece of philosophic writing—instinct with life and enthusiasm—one which must have made its readers feel that the dry bones of a dead system had wakened into life, and that what they had imagined an abstract and dismal science had become instinct with living, practical interest—something to be 'lived' as well as studied.
The Institutes of Metaphysics—the work by which Ferrier's name will descend to posterity—is a development of the Philosophy of Consciousness; but it is more carefully reasoned out and systematised—the result of many years of thoughtful labour. For several years before the work was published (in 1854) the propositions which are contained in it were developed in the course of Ferrier's regular lectures. The Institutes, or Theory of Knowing and Being, commences with a definition of philosophy as a 'body of reasoned truth,' and states that though there were plenty of dissertations on the subject in existence, there was no philosophy itself—no scheme of demonstrated truth; and this, and not simply a 'contribution' to philosophy was what was now required, and what the writer proposed to give. The divisions into which he separates Philosophy are: first, the Epistemology, or theory of knowledge; secondly, the Agnoiology, or theory of ignorance; and thirdly, the Ontology, or theory of being. The fundamental question is, 'What is the one feature which is identical, invariable, and essential in all the varieties of our knowledge?'
The first condition of knowledge is that we should know ourselves, and reason gives certainty to this proposition which is not capable of demonstration, owing to its being itself the starting-point; the counter-proposition, asserting the separate subject and object of knowledge, and the mutual presence of the two without intelligence's being necessarily cognisant of itself, represents general opinion, and the ordinary view of popular psychology. Knowledge, then, Ferrier goes on, always has the self as an essential part of it; it is knowledge-in-union-with-whatever-it-apprehends. The objective part of the object of knowledge, though distinguishable, is not really separable from the subjective or ego; both constitute the unit of knowledge—an utterance thoroughly Hegelian in its character, however Ferrier may disclaim a connection with Hegel's system. In space they may be separated, but not in cognition, and this idealism does not for one moment deny the existence of 'external' things, but only says they can have no meaning if out of relation to those which are 'internal'; as Hegel might have put it, they could be known as separable by means of 'abstraction' only. From this point we are led on to the next statement, and a most important statement it is, that matter per se is of necessity absolutely unknowable; or to what Ferrier calls the Theory of Ignorance. Whether or not this theory can make good the title to originality which its author claims for it, there is no doubt that its statement in clear language, such as no one can fail to understand, marks an important era in English speculation. There are, Ferrier says, two sorts of so-called ignorance: one of these is incidental to some minds, but not to all—an ignorance of defect, he puts it—just as we might be said to be ignorant of a language we had never learned. But the other ignorance (not, properly speaking, ignorance at all) is incident to all intelligence by its very nature, and is no defect or imperfection. The law of ignorance hence is that 'we can be ignorant only of what can be known,' or 'the knowable is alone the ignorable.' The bearing of this important point is seen at once when we turn back to the theory of knowing. Knowledge is something of which the subject cannot shake himself free; 'I' must always, in whatever I apprehend, apprehend 'me.' We don't apprehend 'things,' that is, but what is apprehended is 'me-apprehending-things.' Things-plus-me is the only knowable, and consequently the only 'ignorable.'
This brings us a great way towards the Absolute Idealism associated mainly with the name of Hegel—towards the Knowledge or 'Experience' (a word which Ferrier afterwards himself makes use of) which shall cease to be a 'theory,' being recognised as comprehending within itself all Reality—as recognising no distinction between object and subject, excepting when they are regarded as two poles both equally essential, and separated only when looked at in abstraction. If Ferrier's 'theory of knowledge' did not proceed so far, he at least made the discovery that the subjective idealism of Kant was as unsatisfactory as the relativity of Hamilton, and as certainly tending to agnosticism. Kant's 'thing-in-itself' is not that of which we are ignorant, or a hidden reality which can be known by faith. It is that which cannot possibly be known—and, in other words, a contradiction or nonsense. Now, Ferrier says, we arrive at the true Idealism—the triumph of philosophy. If it is said to reduce all things to the phenomena of consciousness, it does the same to every nothing. What falls out of consciousness becomes incogitable; it lapses, not into nothing, but into what is contradictory. The material universe per se, and all its qualities per se, are not only absolutely unknowable, but absolutely unthinkable. We do indeed know substance, but only as object plus subject—as matter mecum or in cognition as thought together with the self.