In the Human Design System, the G center — also called the Identity or Self center — sits at the middle of the BodyGraph and is described as the seat of identity, love, and direction. It is the place the system associates with who a person is, whom and how they love, and the trajectory their life takes through space. Anatomically the system ties it to the liver and the blood.
In the system’s terms
The G stands in its own category, neither a motor that generates energy nor a pressure or awareness center. The system frames it as the point of orientation — a kind of internal compass. Its diagram places the G at the crossing of the chart’s geometry, and the system speaks of it in terms of “direction”: the felt sense of moving the right way through life, and of being in the right place with the right people. Love, in the system’s usage here, is less an emotion than a quality of self-acceptance and connection radiating from this center.
A defined G is described as a fixed, stable sense of identity and direction — a person who knows, consistently, who they are. An undefined or open G is described as a fluid identity that shifts with environment and company, searching for love and direction, and especially sensitive to the places it occupies and the people it sits among.
Open centers and the not-self
That sensitivity locates the G within the system’s central claim about the nine centers: the open ones are where a person is said to be conditioned, taking on energy that is not steadily their own, in the pattern the system calls the not-self. An open G restlessly searching for a fixed identity, or for the “right” love and direction, is a common example in the literature — and the practice the system prescribes, deconditioning, works from these openings outward.
The interpretive layer that gives the centers their practical meaning — the types, strategy, and authority — was a later addition, introduced by Ra Uru Hu in May 1997, a history the archive documents in ZENO and The Voice on Ibiza.
Sources: the nine centers and the not-self doctrine are described in the system’s own literature, published by Jovian Archive; the 1997 introduction of the type framework is documented from the primary record in ZENO and The Voice on Ibiza. See also the five types and deconditioning.