Stephen Hawking — "I have no idea what the universe is for, but I'm glad it's here."

"The only advantage of my disability is that I do not get put on a lot of boring committees."

"I think the universe is a lot stranger than we can imagine."

"The world would be a much better place if everyone had a clear, rational view of the universe."

"If aliens ever visit us, I think the outcome would be much as when Christopher Columbus first landed in America, which didn't turn out very well for the Native Americans."

"The human race is a single, genetic family. When a child is born, it is born into the human race, not into some particular tribe or nation. The human race is one. And we are all brothers and sisters."