[quote=Goldmarble]
For human growth? No.For individual growth, there is.
[/quote]

Name one example of something that holds any person back from learning any skill/subject. 

Again the only thing that I can see, is that people believe in these false road-blocks on the way to improvement, and just give up too early.

Here's a personal example:

I [i][b][u]sucked[/u][/b][/i] at art when I was young. I sucked at art until recently, as a matter of fact. Here's a picture showing the difference in my work from 2 years ago, and now.

[hider=Big Image][img=http://i779.photobucket.com/albums/yy72/monstahunta2/MedicGirl2yearslater_zps1190a94d.png][/hider]

I just drew the newer version the other night, and while it still is pretty flawed, anyone with eyes can tell that I'm making headway in my efforts to become a better artist.

I spent [i]years[/i] drawing crappy pictures, and feeling bad about my art until I got to the point where I could figure out what was wrong with it. 

Even then I still couldn't fix the problems no matter how hard I tried. I drew, and drew, and drew, to no avail. 

Eventually I got better at fixing things, but sometimes I still hit rough times when trying to fix my drawings. Had I given up though, I would never be at the level I am now. Obviously I still have a long way to go, but I firmly believe that if you practice something enough, you will improve at it.