"Two men are walking down a street. It starts to rain and one of them doesn't get wet. How's that?"

As a kid, I remember, I had read that one liner somewhere. It was so difficult to fathom the meaning of the statement. Funnily its been plenty years since and it still is so difficult to understand what it means. The name of the book is "Zen Speaks" or "Zhuangzi Speaks". Buddha asks this question and no one is able to answer. And then he says ...

--ps..st