When an archer is shooting for nothing he has all his skill.
If he shoots for brass buckle he is already nervous.
If he shoots for a prize of pure gold
he goes blind
or sees two targets
- he is out of his mind!

His skill has not changed,
but the prize divides him.  He cares.
He thinks more of winning than of shooting
and the need to win
drains him of power.

- Chang Tzu