Based on dependent origination something occurs, yet
There is no arising nor passing away.
There is no nihilism nor eternalism.
There is no coming nor going.
There are not many nor one event(s).
Whatever tends to be elaborated becomes almost calm again and again.
And yet as meditation deepens, the ability to clearly see 'things' or experiences fades away. This isn't because your awareness is getting duller or you are losing your ability to retain any clarity in meditation. On the contrary, it actually happens as awareness and clarity deepen.
As your meditation deepens you find that what formerly appeared as substantial now no longer has such a distinct and demarcated identity. You increasingly find it hard to see exactly where 'something' is, or where it isn't.
There seems little doubt that something is occurring, that something is arising. Yet you cannot in any way point to it, and say 'this is this' or 'that is that'.
Do things arise? I really have no idea.
Do they cease? I don't know.
Do they appear to arise - it would seem so. Where are they, or where were they - I have no idea. And so it goes.
Such definites as 'it does exist' fade away. They simply don't hold. And equally their negation - it doesn't exist' don't apply to what you experience, what you know - at all.
Mind is as it is. Experience is as it is. And there's little that one can say about it.