9 is at the crown of the enneagram. How do you interpret this? What does it mean in terms of your understanding of the whole system?
I was discussing this with @Flatlander recently, and we theorized that point 9 holds on to self the least. 9s who are unhealthy are dissociative, losing sense of self. 9s who are healthier might have a sense of self, but still tend to "mesh" with other people and relate easily. This might also contribute to Naranjo's diagnosis: psycho-spiritual laziness. It may pertain to a laziness in defining self, or introspection.
Contrarily, points 4 and 5 are furthest from the crown, and hold most tightly to self. 4 holds on to self through their pursuit of authenticity and personal significance; their need to assert and define an identity. 5 holds on to self through avarice; feeling as though nothing in the world is "of" themselves, except their mind; therefore, rejecting the material world and attachments all together, which leaves them with Naranjo's diagnosis of pathological detachment.
I'm curious to hear more thoughts on the meaning of 9 at the crown of the enneagram, and how the other types pan out in relation to it. =)