Few people understand what Einstein discovered. Even fewer understood it while he lived.

A crusty old Jew from the old country once asked his grandson what all the fuss was about.

"Professor Einstein is the greatest living scientist,” his grandson replied.

"This I have heard, but what did he invent?"

"The Theory of Relativity."

"And you do what with it?"

"It's pretty complicated, Grandpa."

"It wasn't complicated getting away from the Nazis? Tell it to me!"

“Let me put it this way... if a guy’s girlfriend sits on his lap, an hour feels like a minute. But if the same guy sits on a hot stove, a minute feels like an hour. That's the Theory of Relativity."

"Hmph. And from this your Einstein makes a living?"

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