As we shall see, the concept of time has no meaning before the beginning of the universe. This was first pointed out by St. Augustine. When asked: What did God do before he created the universe? Augustine didn't reply: He was preparing Hell for people who asked such questions. Instead, he said that time was a property of the universe that God created, and that time did not exist before the beginning of the universe.

People think I'm a Simpsons character.

Time travel may be possible, but it is not practical.

If the total energy of the universe must always remain zero, and it costs energy to create a body, how can a whole universe be created from nothing?

I believe in the possible. I believe, small though we are, insignificant though we may be, we can reach a full understanding of the universe. You were right when you said you felt small, looking up at all that up there. We are very, very small, but we are profoundly capable of very, very big things.

What was God doing before the divine creation? Was he preparing hell for people who asked such questions?

I don't want to write an autobiography because I would become public property with no privacy left.