“Living too much in one's head can be dangerous.”

“I lived too much in my head instead of the real world.”

“I want everybody to be smart. As smart as they can be. A world of ignorant people is too dangerous to live in.”

“You live in your head too much, you curl up and shut shit out and spend so much time doing it, you forget to live your life. You can’t live your life in your head. That isn’t living.”

“Let me have men about me that are fat,...Sleek-headed men and such as sleep a-nights.Yond Cassius has a lean and hungry look,He thinks too much; such men are dangerous.”

“people are taken much too seriously. one equals no one. anything less than two hundred at a time is not worth mentioning. of course, anybody can be of a different opinion. an opinion is of no consequence whatever. any level-headed man can level headedly adopt two or three different opinions.”