So much comes down to belief.
What does “impossible” really mean? Only that no-one yet believes that such-and-such can be done (running a 4-minute mile, being a famous example).
What about “impossible” for you? Only that you don’t yet believe you can do something
How real are these inhibitions? Does “impossible” actually mean anything concrete at all?
Sometimes it comes down to the stories we tell ourselves; the interpretation we place on past and current events. Those stories shape our beliefs about ourselves; what we think is possible and what we think is impossible.
Perhaps all we need is to give ourselves a more favourable narrative.
Perhaps it’s just a question of telling ourselves a better, stronger, kinder story.
Then much more is possible, because we’ve taught ourselves to believe it.
And that’s all it takes.