The Self (emptiness) is radiant, its own source of joy, just as it is the source of everything. So, even while we are living as the witness, that radiance is bubbling from within our essence. That is what we mean by ecstatic conductivity becoming ecstatic radiance. If you are experiencing it as somewhat flat, closed, and alone, then there is more. The Self is the heart. If there seems to be a paradox in this (joy without enjoyment), that is the nature of enlightenment.
AYP Lesson 392 - What experience on the path is not a shifting perspective?
https://aypsite.com/392.html