An excerpt of An Exchange between the Fingers and the Toes
by John Fuller
Cramped, you are hardly anything but fidgets.
We, active, differentiate the digits:
Whilst you are merely little toe and big
(Or, in the nursery, some futile pig)
Through vital use as pincers there has come
Distinction of the finger and the thumb;
Lacking a knuckle you have sadly missed
Our meaningful translation to a fist;
You can read the rest here.