What does it mean ??

Answer HERE

By the way I found the expression in this interesting article about Web Services (SOAP, WSDL, UDDI).
Stephen Hawking in A Brief History Of Time starts with the anecdote.
A well-known scientist (some say it was Bertrand Russell) once gave a public lecture on astronomy. He described how the earth orbits around the sun and how the sun, in turn, orbits around the centre of a vast collection of stars called our galaxy.

At the end of the lecture, a little old lady at the back of the room got up and said: "What you have told us is rubbish. The world is really a flat plate supported on the back of a giant tortoise."

The scientist gave a superior smile before replying, "What is the tortoise standing on?"

"You're very clever, young man, very clever," said the old lady. "But it's turtles all the way down."

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Well, it isn't turtles all the way down.

In a phrase, "A people acquire and retain well being in proportion to the knowledge they possess ? and the use to which they put it."