The three centers of head, belly and heart, seem to be filters for experience in several different ways.
Organized in the context of separation
If there is a sense of I, and the many identities added to this sense, they form in the context of separation.
The view is dualistic.
The heart is partly open and partly closed.
The emotions are reactive.
And each center tends to operate somewhat independently of the others.
Organized in the context of all as Spirit
When the centers awaken, they reorganize to all as Spirit.
The view is informed by a nondual realization.
The heart is open independent of the form aspect of Spirit.
The emotions has a sense of fullness, quietness and nurturing.
Each of the centers tends to be aligned and coordinated with the others.
Aspects of Spirit when filtered through the three centers
When the centers awaken, they not only reorganize to all as Spirit, but also filter Spirit in different ways. The centers filter the aspects of Spirit, such as awakeness, emptiness, luminosity and form, as white light is filtered through a prism.
Through the head center, emptiness has a crystal clear quality, as fresh mountain air. And the emptiness aspect of awakeness, luminosity and form is most noticeable.
Through the belly center, emptiness has a quiet, dark, full quality, a fertile full ground of potential. And the infinitely alive, intelligent, loving and receptive quality of awakeness and luminosity is most noticeable.
The head center is more yang, masculine, transcendent, free, detached, emphasizing emptiness.
The belly center is more yin, feminine, immanent, embodied, engaged, emphasizing a dark fertile responsive fullness.
More about the heart center later, when that comes more into the foreground.