I notice that a part of me wants to sensor much of this, because it either seems to simple and obvious, or too confused. But I know of course that all this are relative and provisional truths at most, as anything expressed in words or any other way. Relative truths, in this case coming from a not clear awakening, and written down so they can be let go of more easily.
Allowing content to come and go on its own
So in basic meditation, such as Shikantaza, everything is allowed to be as it is. Sights, sounds, tastes, smells, sensations, thoughts arise. They come and go on their own. They live their own life. If there is an impulse to change any of it, then that is included as well. That too is just noticed. It is all fed to awareness, simply, with ease.
Initial mimicking of Ground
In this, there is initially a conscious mimicking of what Ground already does: allowing all content to come and go on its own, freely. It is the seeing (or more accurately emptiness) inherently free from the always changing content, and naturally and effortlessly allowing the seen to live its own life.
Ground shifts into foreground
After a while, Ground tends to shift into the foreground. It notices itself, becomes aware of itself, brings itself into the foreground of awareness. The shifting content falls into the background, and may be recognized as no different and no other than Ground itself.
There is just the Ground of seeing and seen, inherently absent of I anywhere.
Ground recognizing itself
So by mimicking Ground, allowing content to come and go on its own, Ground is allowed to more easily recognize itself, to bring itself into awareness, as the Ground of seeing and seen inherently absent of I anywhere.