In Conversation To Understand Poem by Lawrence S. Pertillar

I think I have mastered the English language.
To understand when, where and how...
The basics of it should be used simplistically.
Although some who wish,
Communicating with words for purposes to prove...
They've obtained intelligence,
Is okay and I don't object to this.

However...
In conversation to understand and comprehend,
I would rather listen to someone...
Knowing how to communicate with that left to impress.
Than to leave without understanding,
What was said to have been left understood.
And some who wish to impress have no ability to listen.