an exhausted mind

I want my mind to be absolutely exhausted and expended at the end of each day. I'm trying to make it a daily habit and goal to think; to think hard, to think deeply, to think exhaustively.

I seem to be day by day growing more keenly aware of my own mortality. I could easily die in a car accident this afternoon, this week, or before the end of the month. It seems such a waste to go a day without exhausting the recesses of your mind.​

While physical exertion is wholly good and beneficial to the person, an exertion of the mind on a daily basis is developing, for me, as a more important daily goal than caring for my physical body. Of course, the two are very closely intertwined, but with limited time and energy I would rather exert my mind than my biceps.