The criterion for distinguishing between active and passive intentionality is whether or not it is accompanied by self-awareness. The first task of this chapter is to clarify how this self-awareness emerges from the stage of unconscious instinctive drive intentionality that precedes its emergence. This is discussed on the basis of an analysis of the instinctive imitation of babbling between mother and child, which shows that for the child, the kinesthesia of babbling can only be felt in “its” own body. This simultaneously brings the distinction between one’s own body and the body of the other into consciousness, which is seen as the reason for the emergence of the distinction between self and other. The second task is to examine the relationship between one’s own mind and body, which is addressed by the emergence of ego consciousness itself. This question of the relationship between body and mind arises in the stage of active synthesis, which presupposes this emerging consciousness of the self. However, as shown in the previous chapter, the time of shared experience flows through the fulfillment of instinct intentionality between mother and child in the stage of passive synthesis, which precedes the distinction between one’s own body and other bodies. It is precisely here that the origin of the question of the relationship between body and mind can be identified. At the same time, it is indicated that the true solution to this problem becomes clear through the explanation of intersubjectivity theory in the next chapter.