“People who don't think shouldn't talk.”
“I don't think..." then you shouldn't talk, said the Hatter.”
“Oh! I don't think I would like to catch a sensible man. I shouldn't know what to talk to him about.”
“Really, it's not people who don't understand us who drive us nuts—it's when those who shouldn't, do.”
“People who don't like doing things together probably...well probably shouldn't get married.”
“...most people in the world don't really use their brains to think. And people who don't think are the ones who don't listen to others.”