Everything hard was impossible, until someone did it.
What’s “impossible” for you?
What was once “impossible” for you?
The only thing you need is to believe you can start.
You don’t have to believe you can finish, or succeed, just some clarity that it’s worth starting.
After you start, just keep going until either 1) you’re done or 2) it makes no sense to continue.
You done plenty of “impossible” things.
And they were “hard” at first.
So, put aside “hard,” and the illusion of “impossible,” and just start something.
You can always stop, but only if you start.