The primary nature of enlightenment is empty. It does not have a point of origination where it comes into existence, nor does it ever cease to exist. It is neither infinite nor finite, as these would be qualities. Yet we see that the idea of enlightenment has a resonance in all of the dynamics of perception within a human being.
We as human beings are not a single body with a single perceptive field or point of view. The hard-wired architecture inside the human form manifests itself in four bodies: the physical body of matter; the subtle physical body of energy that animates the physical body; the causal body of mind and mental formation; and the atman, infinite consciousness.
Enlightenment comes into contact with these four tiers of human consciousness, comes into view, through the very act of perception itself. Yet it remains completely empty.