If we take our prima facie impression of thought, we find on examination first (a) that, in its usual subjective acceptation, thought is one out of many activities or faculties of the mind, coordinate with such others as sensation, perception, imagination, desire, volition, and the like. The product of this activity, the form or character peculiar to thought, is the UNIVERSAL, or, in general, the abstract. Thought, regarded as an activity, may be accordingly described as the active universal, and, since the deed, its product, is the universal once more, may be called the self-actualising universal. Thought conceived as a subject (agent) is a thinker, and the subject existing as a thinker is simply denoted by the term 'I'. ...

Hence thought, viewed as a subject, is what is expressed by the word 'I'; and since I am at the same time in all my sensations, conceptions, and states of consciousness, thought is everywhere present, and is a category that runs through all these modifications.

To reflect is a lesson which even the child has to learn. One of his first lessons is to join adjectives with substantives. This obliges him to attend and distinguish: he has to remember a rule and apply it to the particular case. This rule is nothing but a universal: and the child must see that the particular adapts itself to this universal. In life, again, we have ends to attain. And with regard to these we ponder which is the best way to secure them. The end here represents the universal or governing principle and we have means and instruments whose action we regulate in conformity to the end. In the same way reflection is active in questions of conduct. To reflect here means to recollect the right, the duty - the universal which serves as a fixed rule to guide our behaviour in the given case. Our particular act must imply and recognise the universal law. We find the same thing exhibited in our study of natural phenomena. For instance, we observe thunder and lightning. The phenomenon is a familiar one, and we often perceive it. But man is not content with a bare acquaintance, or with the fact as it appears to the senses; he would like to get behind the surface, to know what it is, and to comprehend it. This leads him to reflect: he seeks to find out the cause as something distinct from the mere phenomenon: he tries to know the inside in its distinction from the outside. Hence the phenomenon becomes double, it splits into inside and outside, into force and its manifestation, into cause and effect. Once more we find the inside or the force identified with the universal and permanent: not this or that flash of lightning, this or that plant - but that which continues the same in them all. The sensible appearance is individual and evanescent: the permanent in it is discovered by reflection.

Nature shows us a countless number of individual forms and phenomena. Into this variety we feel a need of introducing unity: we compare, consequently, and try to find the universal of each single case. Individuals are born and perish: the species abides and recurs in them all: and its existence is only visible to reflection. Under the same head fall such laws as those regulating the motion of the heavenly bodies. To-day we see the stars here, and tomorrow there; and our mind finds something incongruous in this chaos - something in which it can put no faith, because it believes in order and in a simple, constant, and universal law. Inspired by this belief, the mind has directed its reflection towards the phenomena, and learnt their laws. In other words, it has established the movement of the heavenly bodies to be in accordance with a universal law from which every change of position may be known and predicted. The case is the same with the influences which make themselves felt in the infinite complexity of human conduct. There, too, man has the belief in the sway of a general principle. From all these examples it may be gathered how reflection is always seeking for something fixed and permanent, definite in itself and governing the particulars. This universal which cannot be apprehended by the senses counts as the true and essential. Thus, duties and rights are all-important in the matter of conduct; and an action is true when it conforms to those universal formulae.

In thus characterising the universal, we become aware of its antithesis to something else. This something else is the merely immediate, outward and individual, as opposed to the mediate, inward, and universal. The universal does not exist externally to the outward eye as a universal. The kind as kind cannot be perceived: the laws of the celestial motions are not written on the sky. The universal is neither seen nor heard, its existence is only for the mind. Religion leads us to a universal, which embraces all else within itself, to an Absolute by which all else is brought into being: and this Absolute is an object not of the senses but of the mind and of thought.

(1) To speak of thought or objective thought as the heart and soul of the world, may seem to be ascribing consciousness to the things of nature. We feel a certain repugnance against making thought the inward function of things, especially as we speak of thought as marking the divergence of man from nature. It would be necessary, therefore, if we use the term thought at all, to speak of nature as the system of unconscious thought, or, to use Schelling's expression, a petrified intelligence. And in order to prevent misconception, 'thought-form' or 'thought-type' should be substituted for the ambiguous term thought. From what has been said the principles of logic are to be sought in a system of thought-types or fundamental categories, in which the opposition between subjective and objective, in its usual sense vanishes. The signification thus attached to thought and its characteristic forms may be illustrated by the ancient saying that 'nous governs the world', or by our own phrase that 'Reason is in the world'; which means that Reason is the soul of the world it inhabits, its immanent principle, its most proper and inward nature, its universal. Another illustration is offered by the circumstance that in speaking of some definite animal we say it is (an) animal. Now, the animal, qua animal, cannot be shown; nothing can be pointed out excepting some special animal. Animal, qua animal, does not exist: it is merely the universal nature of the individual animals, while each existing animal is a more concretely defined and particularised thing. But to be an animal - the law of kind which is the universal in this case - is the property of the particular animal, and constitutes its definite essence. Take away from the dog its animality, and it becomes impossible to say what it is. All things have a permanent inward nature, as well as an outward existence. They live and die, arise and pass away; but their essential and universal part is the kind; and this means much more than something common to them all.

If thought is the constitutive substance of external things, it is also the universal substance of what is spiritual. In all human perception thought is present; so too thought is the universal in all the acts of conception and recollection; in short, in every mental activity, in willing, wishing, and the like. All these faculties are only further specialisations of thought. When it is presented in this light, thought has a different part to play from what it has if we speak of a faculty of thought, one among a crowd of other faculties, such as perception, conception, and will, with which it stands on the same level. When it is seen to be the true universal of all that nature and mind contain, it extends its scope far beyond all these, and becomes the basis of everything. From this view of thought, in its objective meaning as nous, we may next pass to consider the subjective sense of the term. We say first, Man is a being that thinks; but we also say at the same time, Man is a being that perceives and wills. Man is a thinker, and is universal; but he is a thinker only because he feels his own universality. The animal too is by implication universal, but the universal is not consciously felt by it to be universal: it feels only the individual. The animal sees a singular object, for instance, its food, or a man. For the animal all this never goes beyond an individual thing. Similarly, sensation has to do with nothing but singulars, such as this pain or this sweet taste. Nature does not bring its nous into consciousness: it is man who first makes himself double so as to be a universal for a universal. This first happens when man knows that he is 'I'. By the term 'I' I mean myself, a single and altogether determinate person. And yet I really utter nothing peculiar to myself, for every one else is an 'I' or 'Ego', and when I call myself 'I', though I indubitably mean the single person myself, I express a thorough universal. 'I', therefore, is mere being-for-self, in which everything peculiar or marked is renounced and buried out of sight; it is as it were the ultimate and unanalysable point of consciousness. We may say 'I' and thought are the same, or, more definitely, 'I' is thought as a thinker. What I have in my consciousness is for me. 'I' is the vacuum or receptacle for anything and everything: for which everything is and which stores up everything in itself. Every man is a whole world of conceptions, that lie buried in the night of the 'Ego'. It follows that the 'Ego' is the universal in which we leave aside all that is particular, and in which at the same time all the particulars have a latent existence. In other words, it is not a mere universality and nothing more, but the universality which includes in it everything. Commonly we use the word 'I' without attaching much importance to it, nor is it an object of study except to philosophical analysis. In the 'Ego', we have thought before us in its utter purity. While the brute cannot say 'I', man can, because it is his nature to think. Now in the 'Ego' there are a variety of contents, derived both from within and from without, and according to the nature of these contents our state may be described as perception, or conception, or reminiscence. But in all of them the 'I' is found: or in them all thought is present. Man, therefore, is always thinking, even in his perceptions: if he observes anything, he always observes it as a universal, fixes on a single point which he places in relief, thus withdrawing his attention from other points, and takes it as abstract and universal, even if the universality be only in form.

In the case of our ordinary conceptions, two things may happen. Either the contents are moulded by thought, but not the form; or, the form belongs to thought and not the contents. In using such terms, for instance, as anger, rose, hope, I am speaking of things which I have learnt in the way of sensation, but I express these contents in a universal mode, that is, in the form of thought. I have left out much that is particular and given the contents in their generality: but still the contents remain sense-derived. On the other hand, when I represent God, the content is undeniably a product of pure thought, but the form still retains the sensuous limitations which it has as I find it immediately present in myself. In these generalised images the content is not merely and simply sensible, as it is in a visual inspection; but either the content is sensuous and the form appertains to thought, or vice versa. In the first case the material is given to us, and our thought supplies the form: in the second case the content which has its source in thought is by means of the form turned into a something given, which accordingly reaches the mind from without.

(2) Logic is the study of thought pure and simple, or of the pure thought-forms. In the ordinary sense of the term, by thought we generally represent to ourselves something more than simple and unmixed thought; we mean some thought, the material of which is from experience. Whereas in logic a thought is understood to include nothing else but what depends on thinking and what thinking has brought into existence. It is in these circumstances that thoughts are pure thoughts. The mind is then in its own home-element and therefore free; for freedom means that the other thing with which you deal is a second self - so that you never leave your own ground but give the law to yourself. In the impulses or appetites the beginning is from something else, from something which we feel to be external. In this case then we speak of dependence. For freedom it is necessary that we should feel no presence of something else which is not ourselves. The natural man, whose motions follow the rule only of his appetites, is not his own master. Be he as self-willed as he may, the constituents of his will and opinion are not his own, and his freedom is merely formal. But when we think, we renounce our selfish and particular being, sink ourselves in the thing, allow thought to follow its own course, and if we add anything of our own, we think ill.

If in pursuance of the foregoing remarks we consider Logic to be the system of the pure types of thought, we find that the other philosophical sciences, the Philosophy of Nature and the Philosophy of Mind, take the place, as it were, of an Applied Logic, and that Logic is the soul which animates them both. Their problem in that case is only to recognise the logical forms under the shapes they assume in Nature and Mind - shapes which are only a particular mode of expression for the forms of pure thought. If for instance we take the syllogism (not as it was understood in the old formal logic, but as its real value), we shall find it gives expression to the law that the particular is the middle term which fuses together the extremes of the universal and the singular. The syllogistic form is a universal form of all things. Everything that exists is a particular, which couples together the universal and the singular. But Nature is weak and fails to exhibit the logical forms in their purity. Such a feeble exemplification of the syllogism may be seen in the magnet. In the middle or point of indifference of a magnet, its two poles, however they may be distinguished, are brought into one. Physics also teaches us to see the universal or essence in Nature: and the only difference between it and the Philosophy of Nature is that the latter brings before our mind the adequate forms of the notion in the physical world.

It will now be understood that Logic is the all-animating spirit of all the sciences, and its categories the spiritual hierarchy. They are the heart and centre of things: and yet at the same time they are always on our lips, and, apparently at least, perfectly familiar objects. But things thus familiar are usually the greatest strangers. Being, for example, is a category of pure thought: but to make 'is' an object of investigation never occurs to us. Common fancy puts the Absolute far away in a world beyond. The Absolute is rather directly before us, so present that so long as we think, we must, though without express consciousness of it, always carry it with us and always use it. Language is the main depository of these types of thought; and one use of the grammatical instruction which children receive is unconsciously to turn their attention to distinctions of thought.

Logic is usually said to be concerned with forms only and to derive the material for them from elsewhere. But this 'only', which assumes that the logical thoughts are nothing in comparison with the rest of the contents, is not the word to use about forms which are the absolutely real ground of everything. Everything else rather is an 'only' compared with these thoughts. To make such abstract forms a problem presupposes in the inquirer a higher level of culture than ordinary; and to study them in themselves and for their own sake signifies in addition that these thought-types must be deduced out of thought itself, and their truth or reality examined by the light of their own laws. We do not assume them as data from without, and then define them or exhibit their value and authority by comparing them with the shape they take in our minds. If we thus acted, we should proceed from observation and experience, and should, for instance, say we habitually employ the term 'force' in such a case, and such a meaning. A definition like that would be called correct, if it agreed with the conception of its object present in our ordinary state of mind. The defect of this empirical method is that a notion is not defined as it is in and for itself, but in terms of something assumed, which is then used as a criterion and standard of correctness. No such test need be applied: we have merely to let the thought-forms follow the impulse of their own organic life.

To ask if a category is true or not, must sound strange to the ordinary mind: for a category apparently becomes true only when it is applied to a given object, and apart from this application it would seem meaningless to inquire into the truth. But this is the very question on which every thing turns. We must however in the first place understand clearly what we mean by Truth. In common life truth means the agreement of an object with our conception of it. We thus presuppose an object to which our conception must conform. In the philosophical sense of the word, on the other hand, truth may be described, in general abstract terms, as the agreement of a thought-content with itself. This meaning is quite different from the one given above. At the same time the deeper and philosophical meaning of truth can be partially traced even in the ordinary usage of language. Thus we speak of a true friend; by which we mean a friend whose manner of conduct accords with the notion of friendship. In the same way we speak of a true work of Art. Untrue in this sense means the same as bad, or self-discordant. In this sense a bad state is an untrue state; and evil and untruth may be said to consist in the contradiction subsisting between the function or notion and the existence of the object. Of such a bad object we may form a correct representation, but the import of such representation is inherently false. Of these correctnesses, which are at the same time untruths, we may have many in our heads. God alone is the thorough harmony of notion and reality. All finite things involve an untruth: they have a notion and an existence, but their existence does not meet the requirements of the notion. For this reason they must perish, and then the incompatibility between their notion and their existence becomes manifest. It is in the kind that the individual animal has its notion; and the kind liberates itself from this individuality by death.

The study of truth, or, as it is here explained to mean, consistency, constitutes the proper problem of logic. In our everyday mind we are never troubled with questions about the truth of the forms of thought. We may also express the problem of logic by saying that it examines the forms of thought touching their capability to hold truth. And the question comes to this: What are the forms of the infinite, and what are the forms of the finite ? Usually no suspicion attaches to the finite forms of thought; they are allowed to pass unquestioned. But it is from conforming to finite categories in thought and action that all deception originates.

(3) Truth may be ascertained by several methods, each of which however is no more than a form. Experience is the first of these methods. But the method is only a form: it has no intrinsic value of its own. For in experience everything depends upon the mind we bring to bear upon actuality. A great mind is great in its experience; and in the motley play of phenomena at once perceives the point of real significance. The idea is present, in actual shape, not something, as it were, over the hill and far away. The genius of a Goethe, for example, looking into nature or history, has great experiences, catches sight of the living principle, and gives expression to it.
A second method of apprehending the truth is Reflection, which defines it by intellectual relations of condition and conditioned. But in these two modes the absolute truth has not yet found its appropriate form. The most perfect method of knowledge proceeds in the pure form of thought: and here the attitude of man is one of entire freedom.

That the form of thought is the perfect form, and that it presents the truth as it intrinsically and actually is, is the general dogma of all philosophy. To give a proof of the dogma there is, in the first instance, nothing to do but show that these other forms of knowledge are finite. The grand Scepticism of antiquity accomplished this task when it exhibited the contradictions contained in every one of these forms. That Scepticism indeed went further: but when it ventured to assail the forms of reason, it began by insinuating under them something finite upon which it might fasten. All the forms of finite thought will make their appearance in the course of logical development, the order in which they present themselves being determined by necessary laws. Here in the introduction they could only be unscientifically assumed as something given. In the theory of logic itself these forms will be exhibited, not only on their negative, but also on their positive side.

When we compare the different forms of ascertaining truth with one another, the first of them, immediate knowledge, may perhaps seem the finest, noblest, and most appropriate. It includes everything which the moralists term innocence as well as religious feeling, simple trust, love, fidelity, and natural faith. The two other forms, first reflective, and secondly philosophical cognition, must leave that unsought natural harmony behind. And so far as they have this in common, the methods which claim to apprehend the truth by thought may naturally be regarded as part and parcel of the pride which leads man to trust to his own powers for a knowledge of the truth. Such a position involves a thorough-going disruption, and, viewed in that light, might be regarded as the source of all evil and wickedness - the original transgression. Apparently therefore the only way of being reconciled and restored to peace is to surrender all claims to think or know.

This lapse from natural unity has not escaped notice, and nations from the earliest times have asked the meaning of the wonderful division of the spirit against itself. No such inward disunion is found in nature: natural things do nothing wicked.