The Early Sessions, Book 3

"These subpersonalities are not unconscious to themselves. They are conscious of themselves but they are not conscious of themselves in relation to other selves. They are conscious of needs and drives, and of their existence.... When the outer ego is narrow, and poorly represents these subdominant personalities then they rise up in arm, and when conditions are favorable attempt to express themselves through a momentary weakness on the part of the dominant ego. But without even doing this they may momentarily take over or express themselves through a single function, such as speech or motion, while the outer ego is blissfully unaware. "

Session 119, Page 207