Just listen to what he has to say.
How can you evaluate and listen
at the same time?
And of course start to prepare
your witty retort
or learned comment.
So you heard the words he said?
But did you hear what he meant
and do you really care
or do you just want to make sure
he hears what you have to say?
The words you are preparing
whilst he talks.
And what do you think he is doing
when you are speaking?
And
if you can’t even be bothered
to listen to what your own voice says
why should he?

David Taylor

http://www.poemhunter.com/poem/just-listen-to-yourself/