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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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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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I think and think for months for years. Ninety-nine times the conclusion is false. The hundredth time I am right.

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Common sense is the collection of prejudices acquired by age eighteen.