This sentence is invisible but has meaning when it is not invisible
In the above box we have a sentence that contains "meaning". But, it only has meaning because you are curious enough to find it.
Without curiousity and a drive to discover we can't even see the things which have no meaning that have meaning.
If you are able to understand this without me explaining it...please compose a brief sentence explaining it. If nobody manages to do so I'll eventually clue you in.
Happy hunting.