When we believe things to be hard or even impossible, they tend to be hard or even impossible.
Sometimes when we believe things to be easy, they remain hard or even impossible.
But sometimes, they do become easy.
There seems to be some data on his side for this, and the story is very much like that of the Dweck growth mindset, where the data is very, very strong.
In both cases, shifting to the unlimited mindset is difficult if you don't already have it. (Perhaps I should convince myself that such shifts are themselves easy…)
Among the most effective way to shift one's own beliefs is to work to convince others that it is true. So I need you to believe!
And now I know Tinker Bell must feel.