Second Mystery of My Sister

It’s impossible to define force, but it’s not hard to figure

the size of an arrow drawn in a diagram of the free body.

Blunt.   Entry.

These cannot be measured like the integrity of a wing.

If you think of a torso as a box, you can see

how someone might want to open it with his fingers.

“Second Mystery of My Sister” first appeared in Tin House, Summer 2008.