Because imaginary time behaves like another direction in space, histories in imaginary time can be closed surfaces, like the surface of the Earth, with no [existential] beginning or end.

I'm very interested in film making. It's telling a story, fiction or non-fiction. I have been filmed quite a lot. Contrary to popular belief, filming isn't glamorous. It can be wearingly repetitious, as the same shot is taken over and over again.

Jesus loves you, but everyone else thinks you're an ass.

Just like a computer, we must remember things in the order in which entropy increases. This makes the second law of thermodynamics almost trivial. Disorder increases with time because we measure time in the direction in which disorder increases. You can't have a safer bet than that!

The wise never marry, and when they marry they become otherwise.

My first popular book, 'A Brief History of Time,' aroused a great deal of interest, but many found it difficult to understand.

The thing about smart people is that they seem like crazy people to dumb people.