What do people mean when they say "The sky is the limit"?

the sky is the limit - Fly with the eagles.
@WebMann (4732)
Canada
January 21, 2007 7:56am CST
I imagine that phrase was coined long before we gained the power of flight but I have always been curious to know who started this and exactly what they meant. Do you know the answer?
1 person likes this
1 response
@blueskies (1186)
• United States
23 Feb 07
I've always thought that it referred to the sky as being limitless--so the saying means that no request is too great. Here's a cool website that tells you the meanings and possibly origins of many common idioms. Enjoy :) http://www.goenglish.com/IdiomsIndex.asp
@WebMann (4732)
• Canada
24 Feb 07
thanks Blueskies I will take a look and bookmark that site.