"Nothing remains the same from one moment to the next, you can't step into the same river twice. Life--evolution--the whole universe of space/time, matter/energy--existence itself--is essentially change."

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I know how to learn anything I want to learn. I absolutely know that I could learn how to fly the space shuttle because someone else knows how to fly it, and they put it in a book. Give me the book, and I do not need somebody to stand up in front of the class.

— Will Smith