The world has lost a beautiful and brilliant mind with the passing of Stephen Hawking and these 10 meaningful quotes are a tribute to him. I love the quote about having a sense of humor as being able to find the humor in any situation always makes things better. He obviously was using his sense of humor when he gave the answer to what he spends his time thinking about. RIP Professor Stephen Hawking. If you enjoyed these quotes from Stephen Hawking you might also like to see these Beautiful Positive Thoughts.