The Sky's The Limit?

When people say that the sky's the limit, it's supposed to be inspirational. You can do absolutely anything. Well, that's what it's supposed to mean. In the modern day, it's kind of a terrible saying.

There is so much beyond the sky. Other planets, stars, space - along with all of the amazing stuff that can be found inside of it. There are infinitely more things beyond the sky than there are beneath it. So why are we telling them that there is an infinitesimal cap?

Obviously, it's a connotation vs. denotation thing, but when people start taking you literally, or at least thinking about what your sayings are saying, you may get some unexpected reactions. Always be careful with your words. If you have the time to do so with your writing, there is no reason not to.