French Claire wrote:
Again, Napoleon Hill comes to mind. "There are no limitations, just those in our minds." What can't you do / have / be?

There are impossible things like as a mature adult start growing again a few inches taller. I know that in China they operate on people to make them taller, but this is besides the point. You cannot resurrect a deceased relative/friend. So you need to set realistic targets for yourself once you have recognised your limiting beliefs.