Movie audiences are undoubtedly the least intelligent aggregations of people. They are not _told_ that a crime has been committed, they are _shown_ the crime while it is being committed. Captions warn them of what they are going to see, that they may not misunderstand the meaning of any scene. The movie, like our unconscious, translates every thought into a visual sensation, and when a psychological change cannot very well be visualized, for instance when the villain decides not to kill the ingenue, the fact is flashed on the screen in large type. Pleasures of the eye are probably stronger and simpler than those vouchsafed by other sensory organs.[3] The most uninteresting parade will attract thousands of people, many more for instance, than free concerts in the open. Illustrated lectures appeal to more people than lectures without illustrations. Displays in shop windows, picturesque signs, possess a greater selling power than the best advertising copy. In our waking life, we express our thoughts to ourselves and others through the algebra of abstract concepts. We speak of length, height, volume, weight, hardness, coldness, etc. It is doubtful, however, whether we can imagine length without thinking specifically of something long. In our dreams, the concept length disappears and is always replaced by something long. We notice that abstract thinking is more tiresome than descriptive thinking, that abstract facts demand more exertion in order to be grasped, than concrete facts. A philosopher expounding his theories to an audience tires himself and the audience quicker than an explorer would, describing his travels and possibly illustrating his talk by means of lantern slides. Dream life is further simplified through condensation. This process is the one through which, in waking life, we reach generalizations. When we think of a house we select the essential characteristics of the various houses we have seen, the properties wherein a house essentially differs from, let us say, a bird or a river. In our dreams, condensation is less subtle and more directly based upon our experience. We combine several persons into one, selecting as a rule the most striking features of every one of them. We may see a dream character with the eyes of one person, the nose of another and the beard of a third one. Freud having made one proposal to two different men, Dr. M. and his brother, the former having a beard and the latter being clean shaven and suffering from hip trouble, combined them in a dream in a figure which looked like Dr. M., but was beardless and limped. One of Ferenczi's patients dreamt of a monster with the head of a physician, the body of a horse and draped in a nightgown. Silberer dreamt of an animal which had the head of a tiger and the body of a horse.