More complicated than in ordinary speaking and thinking are the phenomena where the sequence of thought-processes stretches over vast creations of the mind. Very likely the whole of the idea hovers in the mind of the artist, who has received an inspiration for a work of art, or of the philosopher, who's filled with the conception of a complicated system of thought, before either of them carries it out. This anticipation can only be considered an indefinite total feeling, which points the direction for the continuation of the thoughts, and which becomes clearer itself during this continuation. At the same time, in such complicated cases the distracting influences increase in power continually, and accordingly continually alter the quality of the feeling-tone that hovers over the whole. So it sometimes happens that the resulting product becomes in its execution quite different from what it was in its first conception, and it sometimes may happen that such changes occur several times in the course of the process. In all such cases this is generally caused by new associations, which arise from single elements of the total thought, and which, if they do not fit into the regular course, often assimilate with the total thought in a similar manner, or crowd it out altogether. In combinations of creations of thought these secondary influences ultimately increase so much that the regular steady course becomes an exception, and the preponderance of these transforming forces becomes the rule. Although in most cases these phenomena defy objective control, yet there are examples enough in which they can be clearly seen, at least their broad outlines. So Goethe's Faust shows clearly traces of a repeated change in the idea of the whole, and the supposition is forced upon us that the author in his later conceptions had forgotten his first ones. In Wilhelm Meister it almost seems as if he purposely had given as much free scope as possible to the play of associations caused by the plot. These may be extreme cases, and yet there is hardly in the province of science or art any creation of thought which in its execution remains free from any such intervening influences, which have their source partly in new impressions and partly in the thought-compounds caused by the execution or the elaboration of the same in the mind. The two psychical processes, that here interact, have been brought by psychologists under the concepts of "understanding" and "imagination." Where a regular arrangement of the thought-compounds, bound up with a tendency to form them abstractly, is uppermost, it is the custom to assign this to the understanding. Where consciousness is more inclined to the free play of associations and of newly excited thought-forms, and at the same time to a more concrete form of thinking, it is customary to speak of the activity of the imagination. But really we are here not dealing with faculties of thought that can in any way be separated, not even with functions of a different kind, but at bottom always and only with a participation of the apperceptions and associations that enter into all processes of thought, though distributed in a relatively different manner. It is therefore an absolutely wrong conception, if, according to the tradition of the old psychology, imagination is called the specific property of art, and understanding that of science. Science without imagination is worth just as little as art without understanding.
These general conceptions of understanding and imagination correspond in a certain sense only to different points of view, under which we look at the mental functions, in themselves indivisible, and by means of which we separate them according to the relative, participation of their factors. So in the same way associations and combinations of apperception are not processes which belong to differing regions of our psychical life. On the contrary, not only are they always in a state of interaction, but apperceptions show that they arise out of associations, wherever we are able to trace them back to the conditions of their development. Nowhere can we see so clearly this rise of apperceptive combinations out of association as in spoken thought, the region of mental activity which is more than any other open to us in its objective forms. Let us explain this by means of an example, which is closely connected with the above examples of concrete and abstract forms of thought. We have taken the sentences out of Wilhelm Meister, which describe the coming of spring, as a sample of sensuous objective expression in the sense of forms of thought-construction familiar to us. And yet they are absolutely controlled by the laws of our abstract thinking, which join together widely separated elements of thought to one total idea in the interests of a unified combination, and compel us to use, in the form of particles and inflections, abstract elements of conception in order to arrange the parts of the scene described. This is different at a more primitive stage of thinking and expression in speech. Let us take, for example, the following simple statement in our own language: "He gave the children the slate-pencil." This sentence is for us directly concrete. If, however, we were to translate it just as it stands into the language of the inhabitants of the African colony Togo, they would probably not understand it. For such an individual even "slate-pencil" would be too abstract a conception. Further, he would not be able to imagine how any one could give something without having first of all taken it from somewhere else. The elements inserted between "slate-pencil" and the action of giving, which to us serve to combine the whole into one single idea, would mean to him rather a mixture of disparate elements. Lastly, he cannot form the concept "children" without thinking that they are children of some people or other. Accordingly our sentence would run somewhat as follows in the speech of the Togo negro: "He take stone to write something this gives of somebody child they." We must note here that even this literal translation still bears traces of the abstract culture of our language. The difference between substantives and verbs, which we have been forced to use, does not exist in the Togo language. If we look at such a sentence a little more closely, it is at once evident that the ideas are arranged exactly in the same order in which the objective process takes place. Each word denotes only one idea and is not placed in any grammatical category, since there are none such in this language. Therefore the expression of thought is still in essentials at the stage of pure association of ideas. Such a sentence only differentiates itself from a perfectly unsystematic association, that strays from one member to the other—as in the above-mentioned series, "school house garden &c."—by the fact that it follows directly the action described element for element, and therefore reproduces this in the memory exactly as it took place in perception.
Here we meet clearly the two motives which raise pure associations to apperceptive combinations by means of the impulses that lie in the association itself. One of these motives is an objective one. It lies in the regular concatenation of the outward phenomena which present themselves to our view, and which force the association to combine the ideas in the same regularity. A series, such as "school house garden &c.," is only possible when the thought process frees itself from perception and gives itself up to the incidental inner motives, which remain when the continuous succession of phenomena that regulates our thinking is wanting. Therefore association that is joined to these phenomena is in itself the more primitive, and in this way it is the regularity of the course of nature, which transfers its regularity to the normal association of our ideas. Added to this objective motive there is a second, a subjective one. We would not be able to hold together in association a series of impressions given to us in a certain order and to reproduce them again, were it not for our attention that follows from member to member the separate parts of the series, and ultimately binds them together into a whole. Thus ordered thinking arises out of the ordered course of nature in which man finds himself, and this thinking is from the beginning nothing more than the subjective reproduction of the regularity according to law of natural phenomena. On the other hand, this reproduction is only possible by means of the will that controls the concatenation of ideas. Thus human thought, like the human being himself, is at the same time the product of nature and a creation of his own mental life, which in the human will finds that unity which binds together the unbounded manifoldness of mental contents into one whole. In this way the development of apperceptive thought-combinations out of associations corroborates further the result obtained above in considering volitional processes, namely that to every outward voluntary action there correspond inner acts of volition which are occupied in influencing the course of thought. In the close combination between thought and speech this connection between inner and outer volition comes most clearly to light. We cannot act outwardly without at the same time executing inner acts of will. Therefore ordered expression of thought in speech corresponds as outward volitional activity to the control of the will over the associations that originally stray here and there without order. Even although thought in a primitive speech, as in the above example, may be ever so near to mere association of ideas, yet the control by the will is also to be seen in it, from the fact that the association series is one that inwardly is connected together. And with this we have the basis upon which the more complicated forms of apperception can rise, because of the continuous concentrations and combinations in thinking, and these latter at the same time find their adequate expression in the forms of speech. This connection between inner and outer volition, as we see it living in the connection between thought and speech, is ultimately of as great practical as theoretical importance. Only by considering this connection do we arrive at a sufficient understanding for the higher productions of human mental life. It also points forcibly to the fact that the most important part of education for the formation of character—i.e. the training of the will—should not only, and not even in the first instance, be directed to the outward act. Rather must education pay most attention to that inner volition which is occupied with ordered thinking. To make this strong, to make this able to resist the distracting play of associations, is its most important and also one of its most difficult tasks.
Many attempts have been made to investigate the processes of thought in other ways than in the way described above. At first it was thought that the surest way would be to take as a foundation for the psychological analysis of the thought-processes the laws of logical thinking, as they had been laid down from the time of Aristotle by the science of logic. Scholastic philosophy showed great subtlety in this direction in changing psychical processes into logical judgments and conclusions, and there are still followers of this direction at the present day. Starting with the thought-processes in the narrow meaning of the word, this logical explanation of everything psychical was allowed to spread over to associations, the processes of sense-perception, the pure sensations, feelings, emotions, &c., so that in this old scholastic psychology the human consciousness was in danger of becoming a scholastic philosopher, who regulated each of his actions according to the laws of logic. Now such laws are a late product of scientific thinking, which presupposes a long history of thinking determined by a number of specific factors. These norms, even for the fully-developed consciousness, only apply to a small part of the thought-processes. Any attempt to explain, out of these norms, thought in the psychological sense of the word can only lead to an entanglement of the real facts in a net of logical reflections. We can in fact say of such attempts, that measured by results they have been absolutely fruitless. They have disregarded the psychical processes themselves, and have gained nothing at all for the interpretation of the laws of logic simply because they saw in them the primitive facts of consciousness itself.
Many psychologists thought that this method could be improved by making use of direct introspection. They thought by turning their attention to their own consciousness to be able to explain what happened when we were thinking. Or they sought to attain the same end by asking another person a question, by means of which certain processes of thought would be excited, and then by questioning the person about the introspection he had made. It is obvious to the reader, who has followed our discussion so far, that nothing can be discovered in such experiments, where the most complicated psychical processes are investigated directly and without any further preparation. We need first of all a careful analysis of the more elementary psychical processes, of the facts of attention and of the wider scope of consciousness as well as of the relations between them and of the manifold affective processes that intervene in all these cases. Without having gained by these means the necessary information as to the general conditions and, so to say, as to the scene over which our thought-processes move, it is impossible in any way to understand these themselves in their psychical combinations. Many psychologists have connected this difficulty, not with the wrongness of their own method but with the essence of the thought-process. This was explained as an unconscious and (since all sense-perception belongs to consciousness) as a supersensual phenomenon, in the interpretation of which each one must be left to his own speculation. This opened the door at once to the explanation of psychical phenomena according to logical reflections, that were at will read into such phenomena. This alleged method of exact introspection ended ultimately at the point from whence it started, i.e. the scholastic philosophy.
In contradistinction to all this let us remember the rule, valid for psychology as well as for any other science, that we cannot understand the complex phenomena, before we have become familiar with the simple ones, which presuppose the former. Now the general phenomena of the course of simple processes in consciousness, as we have seen them in their most concrete form and under the simplest conditions in our observations of the combination and comparison of rows of beats, give us the most general preliminary conditions, which must be held as a criterion for much more complicated thought-processes. It is evident, however, that these formal conditions of all processes of consciousness cannot be sufficient to account for the special characteristics and phenomena of the development of thought. To do this we must turn our attention to this development itself, as it is shown in the documents of the spoken expression of thought at different stages of consciousness. It is unfortunate that in these and in other cases the development of the child, that is for us the easiest to observe, can give, as is obvious, only a few and in part only doubtful results. The speech and thought of the child, under the present conditions of culture, not only presuppose a number of inherited dispositions, whose influences can scarcely be accurately traced, but it is also absolutely impossible to withdraw the child from the influences to which, from the very beginning, its environment gives rise. Therefore the mental development of our children is under all circumstances not only an accelerated but also in many respects an essentially changed one, in comparison to a purely spontaneous development. On the other hand there are, at least in a relative manner, such stages of a spontaneous development of thinking, in many cases relatively independent of outward influences of culture, in the mental life of more primitive peoples. The different stages, which this mental life shows, find their most adequate expression in the outward phenomena of this mental life itself, and above all in those of speech, which is a means of expression and an instrument of thought at the same time. We can by means of the different stages of the development of speech follow that gradual transition of associative into apperceptive processes of consciousness from step to step. The example given above of a relatively primitive form of spoken thought shows the relation in which it stands to our languages of culture. A closer investigation of this subject would lead us beyond the scope of individual psychology into that of racial psychology, where the most important part deals with the psychological development of thought and speech.