Robert: You ever think about space? What is it? Is it really endless? I mean, if you had a spaceship, could you go flying and flying forever?
Frank: Why don't you give it a shot?
Robert: No! I'm not kidding around here. How can space go on forever, and if it doesn't, then what's at the end, huh?
Marie: Stop it, Robbie, you'll give yourself a tummy ache.
Robert: What about the beginning of time? What was there before that, before time? Nothing? I mean, what is nothing? How could there be nothing? This doesn't bother anybody else?!