“Brain function in the dream will be about twenty times to normal. When you enter a dream within that dream, the effect is compounded.”
Dileep Rao - Yusuf

“- Giddy: Did you know it could be dangerous to wake somebody up when they're dreaming, well, because you leave part of your brain behind. And if it happens too many times, you go feeble in the head.
- Sheela: Yeah. You're living proof.”
Portia de Rossi - Giddy
Elle Macpherson - Sheela

“- Jacob Kowalski: Newt. I don't think I'm dreaming.
- Newt: What gave it away?
- Jacob Kowalski: I ain't got the brains to make this up.”
Dan Fogler - Jacob Kowalski
Eddie Redmayne - Newt

“If I ever see him again, I'm going to cut open his head and eat his brain.”
Dennis Hopper - Deacon

“To have a brain, it's not a sin. To have a brain and not use it, that is a sin.”
Armin Mueller-Stahl - Doc