Analogies in the sphere in the normal mental development of the individual may be considered first. In dealing with the developing thoughts of childhood, we shall refer to one particular tendency, _i. e._, that of _day dreaming_. We know that a certain amount of the day dreaming of the child has to do with the feelings and emotions associated with the questions of reproduction, considered in its broadest sense; _i. e._, including fictitious lovers, marriages, children, etc. Now probably with the child, the day dreaming associated with these feelings is of biological significance, just as the rituals associated with similar feelings are of value to the race. The little girl who is the mother of her doll, who plays at housekeeping, who fictitiously assumes the responsibilities of married life and what not,--the child by developing this feature of her existence in fancy is probably preparing herself for reality. The little boy who becomes a hero in his own fancy, marries a princess, and who overcomes all sorts of difficulties; or the small boy who in his play enters into all the activities of adult life,--probably this child, by entertaining the thoughts of his future life, prepares himself to some extent for future life. These fundamental motives, therefore, which arise in response to biological demands, are the expression of desires, both in the case of the individual and of the race, and they act not only harmlessly but probably beneficially at a certain stage of mental evolution. Again, we have shown how in the race remnants of early and primitive motives continue to appear in various ways long after their outward dynamic value has been lost and when their meaning is no longer understood. Is this not true of the individual? Do we not all recognize in the moods and mental attitudes and even in some of the actions of the adult, remnants of feelings and forces which were dynamic in childhood? These feelings exist although they are not consciously appreciated. The actual experiences are forgotten but the moods and emotions remain. This is analagous to the influence which primitive racial thoughts, beliefs and usages have on present day civilization. The meaning of these usages and symbols is forgotten in many cases but the outward form still exists.