One cannot really argue with a mathematical theorem.

What lies north of the North Pole?

There is no heaven or afterlife for broken down computers; that is a fairy story for people afraid of the dark.

It is tribute to how far we have come in theoretical physics that it now takes enormous machines and a great deal of money to perform experiments whose results we can not predict.

Not to leave planet Earth would be like castaways on a desert island not trying to escape...Sending humans to other planets ... will shape the future of the human race in ways we don't yet understand, and may determine whether we have any future at all.

People think I'm a Simpsons character.

Most sets of values would give rise to universes that, although they might be very beautiful, would contain no one able to wonder at that beauty.