Einstein was confused, not the quantum theory. - Stephen Hawking

I think that it's important for scientists to explain their work, particularly in cosmology. This now answers many questions once asked of religion.

With current technology interstellar travel is utterly impractical. Alpha Centauri can never become a holiday destination.

I will never be as brave as him — I’m not by nature a particularly courageous person — but he showed me that I could try. And that trying might turn out to be the most important part of courage.