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A young man once asked Albert Einstein, a |
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greatest Germany scientist what the secret of success |
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is．The scientist told him what the secret of success |
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is hard work．A little days later, the young man |
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asked him same question again．Einstein was very |
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angrily．But he tried not to show it．He didn’t say |
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something．Instead, he brought out a piece of paper |
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and wrote something at it．Then he handed it to the |
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young man．On it was written：“A＝X＋Y＋Z”． |
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Do you know what does it means? |
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