The trifix, or tritype as it's now called, emphasizes a wholeness to our personality by showing how each individual contains all three centers of intelligence in their personality. The inner lines show additional connections from one type to two other types (stress and security points). By adjusting the inner lines so that all three points are in different centers, you end up with what I'm calling tricenters.

Generally, a person is identified as body-based, heart-based or head-based depending on their enneatype and which center that enneatype is in. Are we just body, heart or head or are we all three? The answer seems obvious to me.

There are three instincts described in the Enneagram personality types. What's interesting to me is that they really have no mandatory connection to the personality types themselves and can be understood separately from the enneatypes.

While the Enneagram symbol limits the number of different enneatypes to nine, a variety of enhancements have been introduced over the years to explain the differences within each type (i.e., why two people of the same type can present so differently). Some of the enhancements to the system are widely accepted and some are more author specific.

The two Enneatypes on either side of each Enneatype are called wings. The term "wing" describes well the placement of the two types. What's insufficient is an explanation of what they are precisely and why placing them on either side is the best placement.