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There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle.
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Two things are infinite: the universe and human stupidity; and I'm not sure about the universe.
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I am enough of an artist to draw freely upon my imagination. Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.
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If you can't explain it to a six year old, you don't understand it yourself.
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If you want your children to be intelligent, read them fairy tales. If you want them to be more intelligent, read them more fairy tales.
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Logic will get you from A to Z; imagination will get you everywhere.
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Life is like riding a bicycle. To keep your balance, you must keep moving.
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Anyone who has never made a mistake has never tried anything new.
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I speak to everyone in the same way, whether he is the garbage man or the president of the university.