Stephen Hawking was a British theoretical physicist, cosmologist, author and Director of Research at the Centre for Theoretical Cosmology within the University of Cambridge. He is renowned for his scientific works and was the first to set out a theory of cosmology explained by a union of the general theory of relativity and quantum mechanics. He was a vigorous supporter of  quantum mechanics.

Hawking had a rare early-onset, slow-progressing form of amyotrophic lateral sclerosis (ALS). ALS paralyzed him gradually over the years. Throughout his life,he communicated using his cheek muscle attached to a speech-generating device. Hawking died on 14 March 2018, at the age of 76.

Here are some of his memorable quotes:

“Look up at the stars and not down at your feet. Try to make sense of what you see, and wonder about what makes the universe exist. Be curious.”

“However difficult life may seem, there is always something you can do and succeed at.”

“My advice to other disabled people would be, concentrate on things your disability doesn’t prevent you doing well, and don’t regret the things it interferes with. Don’t be disabled in spirit as well as physically.”

“If aliens visit us, the outcome would be much as when Columbus landed in America, which didn’t turn out well for the Native Americans.”

“People won’t have time for you if you are always angry or complaining”