If we attempt to trace the relations between dream content and dream thoughts further, we shall do this best by making the dream itself our starting-point and by asking ourselves the question: What do certain formal characteristics of dream representation signify with reference to the dream thoughts? The formal characteristics which must attract our attention in the dream primarily include variations in the distinctness of individual parts of the dream or of whole dreams in relation to one another. The variations in the intensity of individual dream images include a whole scale of degrees ranging from a distinctness of depiction which one is inclined to rate as higher—without warrant, to be sure—than that of reality, to a provoking indistinctness which is declared to be characteristic of the dream, because it cannot altogether be compared to any degree of indistinctness which we ever see in real objects. Moreover, we usually designate the impression which we get from an indistinct object in the dream as “fleeting,” while we think of the more distinct dream images as remaining intact for a longer period of perception. We must now ask ourselves by what conditions in the dream material these differences in the vividness of the different parts of the dream content are brought about. There are certain expectations which will inevitably arise at this point and which must be met. Owing to the fact that real sensations during sleep may form part of the material of the dream, it will probably be assumed that these sensations or the dream elements resulting from them are emphasized by peculiar intensity, or conversely, that what turns out to be particularly vivid in the dream is probably traceable to such real sensations during sleep. My experience has never confirmed this. It is incorrect to say that those elements of the dream which are the derivatives of impressions occurring in sleep (nervous excitements) are distinguished by their vividness from others which are based on recollections. The factor of reality is of no account in determining the intensity of dream images.