Here is one way of slicing the cake of our being, into three realms...
First, the formless... Awake emptiness, capacity for the world. Selfless, timeless, spaceless.
Then, this awake emptiness as form, including innumerable individuals (selfless), unfolding in space and time.
And finally, not less important than the two other, me as this particular individual self, as an individual soul and human self alive here and now, in this little spot of the whole wide world of form. And this is where shadow work, healing, development, maturing, and unfolding as an individual takes place, deepening over time, endlessly (at least as long as this individual is around.)
This corresponds roughly to the three centers...
Spirit filtered through the head center reveals itself as the formless, as awake emptiness, as form as awake emptiness, as individuals inherently selfless.
Spirit filtered through the heart center reveals itself as formless love, and all forms as no other than formless love. It also reveals itself as love for all form, including all individuals, no matter their particulars, as Spirit.
Spirit filtered through the belly center reveals itself as a felt sense of all as Spirit, and as the luminous blackness which, among other things, gives a deep sense of nurturing, fullness and healing for this particular human self.
Each of the three centers include the formless, form and selflessness, although the head center reveals the formless in the foreground, the heart center form - including individuals - in the foreground, and the belly center this particular individual in the foreground.