(It's been done. That makes it harder to do.)

Don't lock yourself in a room with a word called 'Poetry' -
It will breathe all the Oxygen.
Instead, recognize that the word is the room.
And that room is the world.

Don't try to hunt it with bow and spear-point -
It will only laugh at you, escaping
as the air escapes the clapping man.
Instead, laugh with it -
and escape with it also.

In your anger, don't even try to step on it -
it will disappear, but not for the reasons you thought.

Do not follow it, neither let it follow you.
Instead, be with it.
And it will be where it belongs.

Kevin Carlson

http://www.poemhunter.com/poem/ars-poetica-11/