Stephen Hawking: Hello, Sheldon.
Sheldon: Professor Hawking!
Stephen Hawking: I understand you're struggling with professional jealousy.
Sheldon: Thanks, Leonard, now he's not gonna think I'm cool.
Stephen Hawking: Don't worry, I know how you feel. I have never won a Nobel Prize.
Penny: Oh, wow, that doesn't seem fair.
Stephen Hawking: It's fine. I've been on The Simpsons.
Sheldon: How do you deal with the success of your colleagues?
Stephen Hawking: I remind myself every scientific advancement is a victory. Also, I was on Star Trek.
Leonard: (To Penny) Oh, it was a good one. He played poker with Sir Isaac - You don't care.
Stephen Hawking: Don't waste your time on jealousy, Sheldon, you're too brilliant.