"So remember to look up at the stars and not down at your feet. Try to make sense of what you see and hold on to that childlike wonder about what makes the universe exist."
"The universe and the Laws of Physics seem to have been specifically designed for us. If any one of about 40 physical qualities had more than slightly different values, life as we know it could not exist: Either atoms would not be stable, or they wouldn't combine into molecules, or the stars wouldn't form heavier elements, or the universe would collapse before life could develop, and so on..."
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Source: Stephen Hawking warns over making contact with aliens. news.bbc.co.uk. April 25, 2010.
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"It is all right to make mistakes; nothing is perfect because with perfection, we would not exist."