The hold on the mind is so tenuous.
I’m always amazed to see how well people communicate, make decisions, implement plans, and generally do things, considering that it all depends on a fleeting neurotransmitter, a capillary that remains open, a couple of neurons that speak to each other.
The tenuous hold can wobble with a simple fever, not even so high — 101′ or so — which disturbs the sleep and confuses the brain, giving rise to all manner of babblings and strange irrelevant thoughts.