This is a topic that I've thought about, extensively, and the "exercise" that it puts my mind through is second to only pondering existence, itself.

I swear, there's a point of self-inquiry (searching deep into consciousness for insight into these types of questions) at which the mind shuts-off and can go no further into the search/ philosophizing, as if it was a built in mechanism to protect itself from...I don't know, insanity? discovering an unbearable truth? I can only hypothesize.

I don't know, maybe it's just a limitation that's specific to my mind, or range of intellect/ creativity that I fall within.

All I know is that when I deeply ponder questions like "what is death (the actual experience of it)?" and try to grasp the concept of non-existence, or even something relatively "simpler" like wrapping my mind around the concept of infinity, I quickly find my awareness getting stuck in some type of loop in an endless void.

So many questions and seemingly no answers within endless space and eternity - that I would call my consciousness (and "unconscious mind").