This rationalisation and logical construction of imagery, it is necessary to realise, occurs at the very threshold of sleeping consciousness. The dreamer makes no effort to arrange isolated imagery; the arrangement has already occurred when the imagery comes to the focus of sleeping consciousness; so that this reasoning and arranging process is so fundamental and instinctive that it occurs in a region which may be said to be subconscious to dreaming consciousness. If it were not so our dreams would never be real to us, for even dreaming consciousness could not accept as real a hallucination which it had itself arranged. In this sense it is true that, to some extent, our dreams are often based on an ultimate personal and emotional foundation.[46] But this ingeniously guided and rationalised confusion of imagery by no means covers the whole of the reasoning process in dreams. This is a double process. It is first manifested subconsciously in the formation of dream imagery, and then it is manifested consciously in the dreamer's reaction to the imagery presented to him. Every dream is made up of action and reaction between a pseudo-universe and a freely responding individual. On the one side there is the irresistibly imposed imagery--really, though we know it not, conditioned and instinctively moulded by our own organism--which stands for what in our waking hours we may term God and Nature; on the other side is the Soul struggling with all its might, and very inefficient means, against the awful powers that oppose it. The problem of the waking world is presented over again in this battle between the dreaming protagonist and his dreamed fate. Both of these elements are instinctively reasoned out, consciously or subconsciously; both are imperfect fragments from the rich reservoir of human personality. The things that happen to us in dreams, the pseudo-external world that is presented to sleeping consciousness--the imagery, that is, that floats before the mental eye of sleep--are a perpetual source of astonishment and argument to the dreamer. A large part of dreaming activity is concerned with the attempt to explain and reason out the phenomena we thus encounter, to construct a theory of them, or to determine the attitude which we ought to take up with regard to them. Most dreams will furnish evidence of this reasoning process.