Stephen Hawking — "The ultimate goal of science is to provide a single theory that describes the wh…"

"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."

"The human race is a single, genetic family."

"The universe is a grand design, but it's not designed by a grand designer."

"There are no boundaries to human endeavor. We are all different. However bad life may seem, there is always something you can do and succeed at. While there's life, there is hope."

"We are in danger of destroying ourselves by our greed and stupidity."