But in all this period there is germinating in his consciousness--and this very uncertainty is an important element of it--the seed of a far-reaching thought. His sense of persons--moving, pleasure-or-pain-giving, uncertain but self-directing persons--is now to become a sense of agency, of power, which is yet not the power of the regular-moving door on its hinges or the rhythmic swinging of the pendulum of the clock. The sense of _personal agency_ is now forming, and it again is potent for still further development of the social consciousness. It is just here, I think, that imitation becomes so important in the child's life. This is imitation's opportunity. The infant watches to see how others act, because his own weal and woe depends upon this "how"; and inasmuch as he knows not what to anticipate, his mind is open to every suggestion of movement. So he falls to imitating. His attention dwells upon details, and by the principle of adaptation which imitation expresses, it acts out these details for himself. It is an interesting detail, that at this stage the child begins to grow capricious himself; to feel that he can do whatever he likes. Suggestion begins to lose the regularity of its working, for it meets the child's growing sense of his own agency. The youthful hero becomes "contrary." At this period it is that obedience begins to grow hard, and its meaning begins to dawn upon the child as the great reality. For it means the subjection of his own agency, his own liberty to be capricious, to the agency and liberty of some one else. 3. With all this, the child's distinction between and among the persons who constantly come into contact with him grows on apace, in spite of the element of irregularity of the general fact of personality. As he learned before the difference between one presence and another, so now he learns the difference between one _character_ and another. Every character is more or less regular in its irregularity. It has its tastes and modes of action, its temperament and type of command. This the child learns late in the second year and thereafter. He behaves differently when the father is in the room. He is quick to obey one person, slow to obey another. He cries aloud, pulls his companions, and behaves reprehensibly generally, when no adult is present who has authority or will to punish him. This stage in his "knowledge of man" leads to very marked differences of conduct on his part. 4. He now goes on to acquire real _self-consciousness_ and _social feeling_. This stage is so important that we may give to it a separate heading below.