I love feeling my body function at optimal levels.

Swallowing involves around fifty pairs of muscles firing in an order nobody has ever had to learn. You have done it several hundred times today and not once thought about it.

Function stays invisible until it isn't. Anyone who has had to relearn one of these — a hand, a hip, getting from a chair to standing — will tell you the ordinary version is astonishing, and that nobody notices it, including them, six months later.

Pick one thing that is currently working and give it ten seconds of credit.