“Why, anybody can have a brain. That's a very mediocre commodity. Every pusillanimous creature that crawls on the Earth or slinks through slimy seas has a brain. Back where I come from, we have universities, seats of great learning, where men go to become great thinkers. And when they come out, they think deep thoughts and with no more brains than you have. But they have one thing you haven't got: a diploma.”

“In the end what will happen will be what has happened whenever a civilization breaks up. The people who have brains and courage come through and the ones who haven't are winnowed out.”

“One of the things that has to be faced is the process of waiting to change the system, how much we have got to do to find out who we are, where we have come from and where we are going.”

“Your brain, Peekay, has two functions; it is a place for original thought, but also it is a reference library. Use it to tell you where to look, and then you will have for yourself all the brains that have ever been”

“The brain can be a dangerous thing. Even more so if you haven't got one.”

“Sometimes my thoughts are too slimy for my brain, and they come shooting out of my penis. They are life-changing thoughts, so I’d recommend taking them deep inside of you.
”