The centers of intelligence, or simply the centers, group the nine types into three groups of three (i.e., 891, 234, and 567). Each type is said to have a preoccupation with one of the centers.
The labeling and meaning of each center varies between teachers. Here are some common examples.
- (891) - Gut, Body-Based, Anger, Self-Forgetting
- (234) - Heart-Based, Shame, Image
- (567) - Head-Based, Fear
The 3rd book in the Enneagram User Guide series, Decoding the Enneagram, explores the common interpretations of the centers and looks at the core focus of each type to better understand how each type uses its preferred center.