Sometimes things don't work out the way you expect. Things don't really take off the way you had expected. Problems come up. Parts break, you get distracted, you make a little tiny mistake at the wrong time, the weather makes issues, people can't get there because life happens, we forget stuff. And so, something doesn't happen the way you hope. There are times to give up, realize that the cost is not worth it. Other times though, you just need to keep going. Because, when you're learning to fly, there are bumps and bruises along the way, but chances are... once you're gliding in the clouds.... you'll forget the little bumps.
I keep dreaming of the clouds though.