Poetry is like art, except there is no paint...
Poetry is like sports, except there is no sweat...
Poetry is like chatting, except there is no sound...
Poetry is like learning, except there is no teacher...

No paint is necessary but the words we speak.
No sweat is necessary but the frustrations of a muted mind.
No sound is necessary but the mimicry of expressions.
No teacher is necessary but the mind, willing to listen evermore.