Let us now in the light of these considerations, universally acknowledged in natural science, consider the question of the existence or non-existence of psychical laws. It is of course self-evident that we may consider as laws only such regularities that lie within the process of consciousness, and not such as lie outside of consciousness, e.g. such as belong to physiological processes of the brain. Accordingly we may call combinations of sensations or of simple feelings into complex ideas, emotions, &c., psychical laws, if they in any way take place regularly. On the other hand, the fact that, if a bright point appears on a dark field of vision, the lines of vision of the two eyes are at once directed towards this point--this fact is a physiological and not a psychical law. Naturally such physical laws, as the one in our example, may have a determining influence upon the operation of certain psychical laws. But this does not hinder us from making a sharp distinction between the two kinds of law. We keep as a principle for a psychical law, that the components as well as the resultants of the effects of such laws are parts of immediate consciousness, i.e. sensations, feelings and their combinations. Now if we cast a glance, while keeping firmly to this criterion, over the manifold processes of consciousness, which have been touched upon in this book, we see at once that all these processes bear the character of a stem regularity. Not in the sense that these laws are fixed rules without exceptions (such laws as we have seen above do not exist, because of the never-failing interference from other influences), but in the only sense permissible, i.e. that each complex phenomenon can be reduced to a lawful co-operation of elements. If this requirement were not fulfilled, there would be no cohesion in our psychical life. It would break up into a chaos of unconnected elements, and consciousness itself, which is just the opposite of such a chaotic disarrangement, would be impossible. Therefore each separate idea is a combination of sensations according to law. A given clang of a definite timbre is put together unchangeably in the same way out of elementary tone-sensations. That certain objective sources of sound, e.g. strings, air spaces, possess physical qualities, by means of which such regular combinations of tone-quality arise, is undoubtedly a very important factor for the psychical law of the blending of tones. But these physical facts have in themselves nothing whatever to do with this law. If our consciousness was not disposed to such regular combinations, those objective factors would remain powerless. And it is exactly the same with the combination of light-sensations into spatial ideas, with the union of the images of an object in the right and left eye into one total image, with the rise of peculiar total feelings out of their partial feelings, as we have observed in the organic feeling and in the