"Imprison it"...? Hmm. My mother used to say to me "Put your words on the palm of your hand and look at them before you speak." I liked that. Sweet Benjamin needs to guard against speaking without thinking.
If he's going to be a speaker, he needs to consider his message and his audience before he speaks.
But "imprison" ...? What do you think?
"Seek not to change the world, but choose to change your mind about the world. What you see reflects your thinking. And your thinking but reflects your choice of what you want to see."
From A Course In Miracles