"I have always been fascinated by the big questions."

"We are all different, but we share the same human spirit. Perhaps it's human nature that we adapt and survive."

"I wouldn't compare it to sex, but it lasts longer."

"The human race is a single genetic stock, and we are all brothers and sisters. It's time that we started to act like it."

"I think that the human race has a destiny to explore the universe."