"There is a theory which states that if ever anybody discovers exactly what the Universe is for and why it is here, it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another theory which states that this has already happened."

"A scientist can discover a new star, but he cannot make one. He would have to ask an engineer to do that."

"We can lick gravity, but the paperwork's a bit tougher."

"Photon's have mass? I didn't even know they were Catholic!!!!"