Someone you are bound to is in trouble, and every cell you have is built to move toward them, and the not-moving is a physical effort, like holding your hand steady over a flame.

For thirty years that reflex had been the deepest fact of my character — Shannon helps, Shannon fixes, Shannon does not walk away — and my family had learned to pull it the way you pull a lever, reliably, whenever they needed the machine to dispense.

Standing in that corridor, I felt the lever pulled one last time, felt the old reflex fire, my body actually turning a few degrees back toward my brother’s shaking voice.

And then I felt something new underneath it, something that had been quietly assembling itself all afternoon in a supply closet and a stairwell and a doorway: the understanding that a reflex is not an obligation, and that I was allowed to feel the pull and still not move.