More quotes by Stephen Hawking

"One, remember to look up at the stars and not down at your feet. Two, never give up work. Work gives you meaning and purpose and life is empty without it. Three, if you are lucky enough to find love, remember it is there and don't throw it away."
"[In the Universe it may be that] Primitive life is very common and intelligent life is fairly rare. Some would say it has yet to occur on Earth."
"Keeping an active mind has been vital to my survival, as has been maintaining a sense of humor."
"The downside of my celebrity is that I cannot go anywhere in the world without being recognized. It is not enough for me to wear dark sunglasses and a wig. The wheelchair gives me away."
"I have noticed that even those who assert that everything is predestined and that we can change nothing about it still look both ways before they cross the street"