You might fail.
You could have to begin again.
They may laugh at you.
Perhaps they will misunderstand you.
People you thought were friends will abandon you – in the end, we all die alone.
The plans could fall through.
It might not be as good as you thought it was.
People you respect may doubt you.
Others may not understand your passion or your cause.
You will grow tired of explaining yourself.
It might not work out after all.
And that would be bad.
But not as bad as not trying.