When we are identified with the content of awareness, there is also inevitably a sense of a doer. And when the identification goes of of the content (and back into the ground of awake void) there is still doing, but any sense of a doer goes out along with it.
A region of content filtered as a separate self, and appearing as a doer
When there is identification with content of awareness, I take myself to be a region of the content of awareness, and other regions as other. I am these thoughts, sensations, sights of this body, sounds of this voice, and an idea of a separate self placed on all of these. I think. I feel. I choose. I decide. I act. I do.
There is not only the doing, but also a doer.
Not filtered through a sense of a separate self, so no doer
When identification goes out of the content of awareness, and back into the awake void (and all content arising as the awake void itself), the sense of a separate self goes out as well. And when a sense of a separate self goes out, any sense of a doer goes out with it.
There is just the doing, with no doer. It is all just happening. A dance of form on the surface of awake emptiness. A mystery, happening within, to and as the awake void.
Cause and effect
Filtered slightly through thoughts, we see that any change in the world of form has infinite causes and infinite effects.
When there is a sense of a separate self, and an identification with a region of the content of awareness, there tends to be an identification with the very local causes and effects, those happening within this individual, the region of content taken as I. I think, choose, react, and then I do.
When identification goes out of content, and the sense of a separate self goes out with it, it is easier to see how any change, including any of the local ones, have infinite causes and infinite effects. Any shifts within this individual have infinite causes and effects, they are the local expressions of the movements of the whole of the world of form. There is thinking, choosing, reacting, and doing, and even causalities within this, but no doer, no separate self doing any of it.