214 PERSONALITY OF THE PRESCHOOL CHILD The structure of the form itself may reveal both the way in which the child relates and unifies different impressions or expres- sions and the degree of the child's development, since the develop- ment takes place in proportion to such a unifying principle. The unifying principle is developed from the state of "relation" to that of "integration." This is expressed graphically in the first stage when the child connects different forms by lines in the manner of pictographs (as we know them from some Indian tribes). In the second stage different smaller form elements are embraced by larger ones, in an ornamental way, indicating the principle of hierarchic order and of integration. While simple lines are more a reflex of the child's impulses, forms are an externalization of the child's concepts of his environment. In the handling of forms the child manifests his attitude toward an object or a person, thus allowing us to draw conclusions about his behavior. Generally speaking, a clear patterning of forms suggests a free approach of the child to the object; a vague, insecure, ham- pered shape hints at inhibitions up to fears. Emphasis on details or exactness may indicate an ability in observing reality (Fig. 8), while fanciful forms suggest the pre- dominance of a private world with dreams and fantasies (Fig. 55). A form principle which has a specific importance in the drawings of young children is that of a surrounding line (see p. 147). Sur- rounding lines may represent the concept of differentiation, cor- responding to the beginning limitation of the child's own individual- ity from that of others. The child thus establishes his own sphere of action and expression, his own standard, his own rules. The expression of a private world may in extreme cases take the form of neurotic schematism. A surrounding line may also represent a pro- tection. The child may feel insecure and try to protect his self- representation or the objects, with which he identifies himself. Finally, a surrounding line may stand for the concept of isolation. Only by further investigation can we discover the psychological value of the pattern. If we have, for instance, narrow movements, or weak pressure, we may deduce that the surrounding line does not represent the beginning of differentiation of the child's own person- ality, but rather the passive feeling of isolation and being hampered. If we have broad movements and high pressure, the surrounding line may express the child's tendency to build up Ms own field of action. A surrounding line of a big size may also express the child's tendency toward possession and expansion, All children try to ex- pand themselves, some in activity, others in aggression, and others