Title, but state your age as well.
Not that it serves any value, but fairly often as a consequence of considering that my experience of existing is all here and all now. There is nothing else. When my body finally gives up, so does my "mind" for want of a better word.
I suppose it is getting more frequent the older I get. I was kind of hoping that I would pass through some kind of psychological threshold of acceptance at some point, as the chronic dwelling on an inponderable is all rather tedious really. It doesn't seem to have happened yet, though.
That may be a good thing.